Patent Description:
<CIT> discloses a two-wheeled motor vehicle. The two-wheeled motor vehicle includes a body frame and an engine. The engine is fixed to the body frame. Other straddled vehicles are known from the following publications: <CIT>, <CIT> or <CIT>.

The engine includes a cylinder member, a cylinder head, and a head cover. The cylinder head is provided above the cylinder member. The head cover is provided above the cylinder head.

The two-wheeled motor vehicle includes an intake pipe. The intake pipe is connected to the cylinder head. The intake pipe includes a throttle device. The throttle device is located behind the cylinder head.

The two-wheeled motor vehicle includes an ignition device. The ignition device includes a spark plug, a plug cord, and an ignition coil. The spark plug is attached to the cylinder head. The plug cord is connected to the spark plug. The ignition coil is connected to the plug cord.

The ignition coil includes a casing, a secondary terminal, and a flange. The secondary terminal is attached to the casing. The secondary terminal is connected to the plug cord. The flange is attached to the casing.

The two-wheeled motor vehicle includes a supporting portion. The supporting portion supports the ignition coil. The supporting portion is connected to the flange. The supporting portion is supported by the body frame. Accordingly, the ignition coil is supported by the body frame via the supporting portion. The supporting portion is not supported by the engine. Accordingly, the ignition coil is not supported by the engine.

The ignition coil is located in front of the head cover. More specifically, the ignition coil is entirely located more forward than a front end of the head cover.

As described above, in the straddled vehicle whose engine is fixed to the body frame, the currently-used ignition coil is not supported by the engine. In the technical field of the straddled vehicle with engine fixed to the body frame, it is currently considered that the body frame preferably supports the ignition coil. That is because the ignition coil does not easily undergo heat and vibration of the engine. That is because the heat and vibration of the engine are not easily transferred to the ignition coil.

The Inventor studied that the ignition device is arranged more appropriately. The present invention has been made regarding the state of the art noted above, and its object is to provide a straddled vehicle that allows more appropriate arrangement of an ignition device.

The Inventor studied as under to arrange the ignition device more appropriately.

First of all, the Inventor found that vibration of a body frame differs from vibration of an engine. Firstly, the vibration of the body frame is weaker than the vibration of the engine. For example, an amplitude of the vibration of the body frame is smaller than an amplitude of the vibration of the engine. Secondly, the vibration of the body frame deviates from the vibration of the engine. For example, a period of the vibration of the body frame differs from a period of the vibration of the engine. For example, a frequency of the vibration of the body frame differs from a frequency of the vibration of the engine. For example, a phase of the vibration of the body frame is shifted from a phase of the vibration of the engine.

The Inventor found, based on the above finding, that vibration of an ignition coil differs from vibration of a spark plug. As described above, the ignition coil is supported by the body frame in the traditional art. Accordingly, the ignition coil receives the vibration of the body frame. As described above, the spark plug is conventionally attached to the engine. Accordingly, the spark plug receives the vibration of the engine. As described above, the vibration of the body frame differs from the vibration of the engine. Accordingly, the vibration transferred to the ignition coil differs from the vibration transferred to the spark plug. This generates difference in vibration between the ignition coil and the spark plug in the traditional art.

Then, the Inventor studied for suppressing the difference in vibration between the ignition coil and the spark plug. The difference in vibration between the ignition coil and the spark plug corresponds to a difference between the vibration of the ignition coil and the vibration of the spark plug.

Here, a throttle device includes a throttle valve and a magnetic sensor. The magnetic sensor detects a position of the throttle valve. Specifically, the magnetic sensor detects the position of the throttle valve by sensing a magnetic field.

Then, the Inventions found that the ignition device may affect a detection accuracy of the magnetic sensor.

Firstly, the ignition coil may affect the magnetic field sensed by the magnetic sensor. That is because the ignition coil is a high voltage component that generates high voltages. For example, the ignition coil may distort the magnetic field sensed by the magnetic sensor. For example, the ignition coil may form a disturbance magnetic field for the magnetic sensor. The detection accuracy of the magnetic sensor is reduced when the ignition coil significantly affects the magnetic field sensed by the magnetic sensor.

Secondly, radio noise emitted from the ignition device may also affect the magnetic field sensed by the magnetic sensor. That is because the ignition device is a source of the radio noise. For example, the radio noise emitted from the ignition device may distort the magnetic field sensed by the magnetic sensor. For example, the radio noise emitted from the ignition device may form a disturbance magnetic field for the magnetic sensor. The detection accuracy of the magnetic sensor is reduced when the radio noise from the ignition device significantly affects the magnetic field sensed by the magnetic sensor.

Then, the Inventor paid attention to protection of the magnetic sensor from the ignition coil. Here, the protection of the magnetic sensor from the ignition coil corresponds to protection of the magnetic field, sensed by the magnetic sensor, from the ignition coil. Moreover, the Inventor paid additional attention to protection of the magnetic sensor from radio noise of the ignition device. Here, the protection of the magnetic sensor from the radio noise of the ignition device corresponds to protection of the magnetic field, sensed by the magnetic sensor, from the radio noise of the ignition device.

In summary, the Inventor studied the straddled vehicle in which the ignition device can be installed more appropriately. More specifically, the Inventor studied installation of the ignition device that can suppress the difference in vibration between the ignition coil and the spark plug, and can protect the magnetic sensor from the ignition coil as well as from the radio noise of the ignition device.

Based on the above findings and study, this invention provides the following construction. A straddled vehicle, according to this invention, includes:.

The straddled vehicle includes the body frame and the engine. The engine is fixed to the body frame. The engine includes the cylinder member, the cylinder head, and the head cover. The cylinder member includes the cylinder bore. The cylinder bore centers on the cylinder axis. The cylinder axis is an imaginary straight line. The cylinder head is provided above the cylinder member. The head cover is provided above the cylinder head.

The straddled vehicle includes the throttle device. The throttle device controls an intake air amount of the engine. The throttle device is located behind the cylinder head. The throttle device includes the throttle valve and the magnetic sensor. The magnetic sensor detects the position of the throttle valve.

The straddled vehicle includes the ignition device. The ignition device includes the spark plug, the plug cord, and the ignition coil. The spark plug is attached to the cylinder head. The plug cord is connected to the spark plug. The ignition coil is connected to the plug cord.

The straddled vehicle includes the supporting portion. The supporting portion supports the ignition coil. The supporting portion is connected to the flange. The supporting portion is supported by the head cover. Accordingly, the ignition coil is supported by the head cover via the supporting portion. As described above, the spark plug is attached to the cylinder head. Accordingly, the ignition coil and the spark plug are both supported by the engine. This can effectively suppress a difference in vibration between the ignition coil and the spark plug. That is, a difference between vibration of the ignition coil and vibration of the spark plug can be suppressed effectively. Accordingly, the ignition device can be installed more appropriately.

The head cover is lower in temperature than the cylinder member and the cylinder head. Accordingly, the ignition coil can be protected suitably from the heat of the engine. This can install the ignition device more appropriately.

As described above, the throttle device is located behind the cylinder head. At least part of the ignition coil is located in front of the cylinder axis in the side view of the straddled vehicle. Accordingly, the magnetic sensor can be sufficiently spaced apart from the ignition coil. In other words, a separation distance between the magnetic sensor and the ignition coil can be obtained appropriately. This can protect the magnetic sensor from the ignition coil suitably. That is, the magnetic field sensed by the magnetic sensor can be protected from the ignition coil suitably. Consequently, the magnetic sensor can detect the position of the throttle valve accurately.

The supporting portion electrically connects the head cover to the flange. Accordingly, the radio noise emitted by the ignition device is reduced effectively. This can protect the magnetic sensor from the radio noise of the ignition device suitably. That is, the magnetic field sensed by the magnetic sensor can be protected from the radio noise of the ignition device suitably. Consequently, the magnetic sensor can detect the position of the throttle valve more accurately.

Here, it is presumed that the radio noise emitted from the ignition device is reduced effectively because a current loop containing the ignition device becomes small effectively. Specifically, current flows from the ignition coil through the plug cord to the spark plug. The current flows from the spark plug to the engine. Then, the current returns from the engine through the supporting portion to the ignition coil. In such a manner as above, the current loop is a path of the current that flows in the ignition coil, the plug cord, the spark plug, the engine, the supporting portion, and the ignition coil in this order. More specifically, the current loop is a path of the current that flows in the ignition coil, the plug cord, the spark plug, the cylinder head, the head cover, the supporting portion, and the ignition coil in this order. Here, the current loop does not contain the body frame. That is because the supporting portion electrically connects the head cover to the flange. That is because the supporting portion electrically connects the engine to the ignition coil. Since the current loop does not contain the body frame, the current loop becomes small effectively. Specifically, an area surrounded by the current loop becomes small effectively. Accordingly, the radio noise emitted from the ignition device is reduced effectively.

In summary, first of all, the engine is fixed to the body frame, the ignition coil is supported by the head cover of the engine, and the spark plug is attached to the cylinder head. Consequently, in the straddled vehicle whose engine is fixed to the body frame, the difference in vibration between the ignition coil and the spark plug can be suppressed suitably. Moreover, the ignition coil can be protected suitably from the heat of the engine. This results in more suitable installation of the ignition device. Secondly, the throttle device is located behind the cylinder head, and at least part of the ignition coil is located in front of the cylinder axis in the side view of the straddled vehicle. Accordingly, the magnetic sensor can be sufficiently spaced apart from the ignition coil. This results in suitable protection of the magnetic sensor from the ignition coil. Thirdly, the supporting portion electrically connects the flange to the head cover. This effectively reduces the radio noise radiated from the ignition device. This results in suitable protection of the magnetic sensor from the radio noise of the ignition device.

As described above, with the straddled vehicle according to the present invention, the ignition device can be installed more appropriately. Specifically, with the straddled vehicle according to the present invention, the difference in vibration between the ignition coil and the spark plug can be suppressed, and the magnetic sensor can be protected from the ignition coil as well as from the radio noise of the ignition device.

It is preferred in the straddled vehicle described above that the ignition coil is entirely located in front of the cylinder axis in the side view of the straddled vehicle. This can sufficiently obtain the separation distance between the ignition coil and the magnetic sensor.

It is preferred in the straddled vehicle described above that the throttle device is entirely located behind the cylinder axis in the side view of the straddled vehicle. This can suitably obtain the separation distance between the ignition coil and the magnetic sensor.

It is preferred in the straddled vehicle described above that at least part of the ignition coil is located more rearward than a front end of the head cover. Accordingly, the ignition coil is located near the head cover. Consequently, the head cover can support the ignition coil suitably.

Moreover, the throttle device is located behind the cylinder head, at least part of the ignition coil is located in front of the cylinder axis in the side view of the straddled vehicle, and at least part of the ignition coil is located more rearward than the front end of the head cover. Accordingly, the ignition coil is not too close to the magnetic sensor and not too far from the spark plug. In other words, the current loop is made as small as possible while the separation distance between the ignition coil and the magnetic sensor is obtained sufficiently. This can protect the magnetic sensor from the ignition coil while protecting the magnetic sensor from the radio noise of the ignition device. This results in achievement in a high level both the protection of the magnetic sensor from the ignition coil and the protection of the magnetic sensor from the radio noise of the ignition device.

It is preferred in the straddled vehicle described above that the ignition coil is entirely located more rearward than a front end of the head cover. The head cover can support the ignition coil more suitably. Moreover, it is possible to achieve both the protection of the magnetic sensor from the ignition coil and the protection of the magnetic sensor from the radio noise of the ignition device in a much higher level.

It is preferred in the straddled vehicle described above that, in the side view of the straddled vehicle, the ignition coil overlaps a first imaginary line that passes a front end of the head cover and is parallel to an up-down direction of the straddled vehicle. The ignition coil overlaps the first imaginary line in the side view of the straddled vehicle. Here, the first imaginary line passes the front end of the head cover, and is parallel to the up-down direction of the straddled vehicle. Accordingly, the head cover can support the ignition coil more suitably. Moreover, it is possible to achieve both the protection of the magnetic sensor from the ignition coil and the protection of the magnetic sensor from the radio noise of the ignition device in a much higher level.

It is preferred in the straddled vehicle described above that at least part of the ignition coil is located above the head cover, and overlaps the head cover in plan view of the straddled vehicle. The head cover can support the ignition coil more suitably.

It is preferred in the straddled vehicle described above that at least part of the ignition coil is located higher than the throttle device. The magnetic sensor can be spaced apart from the ignition coil easily.

It is preferred in the straddled vehicle described above that at least part of the ignition coil is located higher than an upper end of the head cover, and at least part of the throttle device is located lower than the upper end of the head cover. This can protect the ignition coil from the heat of the engine suitably. Moreover, this can easily obtain the separation distance between the ignition coil and the magnetic sensor.

It is preferred in the straddled vehicle described above that the ignition coil is entirely located more forward than the spark plug, and the throttle device is entirely located more rearward than the spark plug. The current loop is formed more forward than the spark plug. The current loop extends forward from the spark plug. The throttle device is located more rearward than the current loop. The throttle device is entirely located more rearward than the current loop. This can protect the magnetic sensor from the radio noise of the ignition device suitably.

It is preferred in the straddled vehicle described above that the throttle device is entirely located more rearward than the ignition device. This can protect the magnetic sensor from the radio noise of the ignition device suitably.

It is preferred in the straddled vehicle described above that the ignition coil is entirely located higher than the spark plug, and at least part of the throttle device is located higher than the spark plug. This can arrange the ignition coil, the spark plug, and the throttle device at appropriate positions.

It is preferred in the straddled vehicle described above that the spark plug overlaps the cylinder axis in the side view of the straddled vehicle. The spark plug can be positioned near the ignition coil. This further reduces the size of the current loop. Accordingly, the radio noise from the ignition device is further reduced.

It is preferred in the straddled vehicle described above that the spark plug is entirely located in front of an extension of a rear edge of the cylinder bore in the side view of the straddled vehicle. This can easily reduce the size of the current loop. Accordingly, the radio noise of the ignition device can be reduced suitably. This results in more suitable protection of the magnetic sensor from the radio noise of the ignition device.

Here, the extension is an imaginary straight line obtained by extending the rear edge of the cylinder bore. The extension is parallel to the cylinder axis. The extension is located at a position where the cylinder axis is shifted rearward.

It is preferred in the straddled vehicle described above that the ignition coil is entirely located in front of the extension of the rear edge of the cylinder bore in the side view of the straddled vehicle. The magnetic sensor can be protected from the radio noise of the ignition device more suitably. The magnetic sensor can be protected from the ignition coil more suitably.

It is preferred in the straddled vehicle described above that the throttle device is entirely located behind the extension of the rear edge of the cylinder bore in the side view of the straddled vehicle. The magnetic sensor can be protected from the radio noise of the ignition device more suitably.

It is preferred in the straddled vehicle described above that the ignition coil is entirely located at one of a right area rightward of the cylinder axis and a left area leftward of the cylinder axis in the plan view of the straddled vehicle, and the spark plug is entirely located at the other of the right area and the left area in the plan view of the straddled vehicle. This can bend the plug cord relatively gently. For example, the plug cord can be bent at a relatively low curvature. For example, the plug cord can be bent at a relatively large radius of curvature. Accordingly, the plug cord can be laid easily.

It is preferred in the straddled vehicle described above that the supporting portion extends upward and forward from the head cover. The supporting portion can support the ignition coil suitably.

It is preferred in the straddled vehicle described above that at least part of the supporting portion overlaps the head cover in the plan view of the straddled vehicle. The head cover can support the supporting portion suitably. Consequently, the supporting portion can support the ignition coil suitably.

It is preferred in the straddled vehicle described above that the supporting portion contacts the head cover. The supporting portion can electrically connect the head cover (engine) to the ignition coil suitably.

It is preferred in the straddled vehicle described above that the supporting portion contacts the flange. The supporting portion can electrically connect the head cover (engine) to the ignition coil suitably.

It is preferred in the straddled vehicle described above that the supporting portion includes a boss connected to the head cover, and a fastening portion configured to fasten the flange to the boss, and that the boss electrically connects the head cover to the flange. The supporting portion can electrically connect the engine to the ignition coil suitably while supporting the ignition coil suitably.

It is preferred in the straddled vehicle described above that the cylinder axis extends upward and forward at an angle of <NUM> degrees or more with respect to a horizontal line in the side view of the straddled vehicle. The cylinder axis is closer to a vertical line than the horizontal line. Consequently, the present invention is suitably applicable to the engine having the cylinder axis that is closer to the vertical line than the horizontal line.

It is preferred in the straddled vehicle described above that the body frame includes a main frame connected to the engine, and that at least part of the main frame is located above the engine and the ignition device in the side view of the straddled vehicle. As described above, the current loop does not contain the body frame. Accordingly, the current loop can be reduced in size suitably even when at least part of the main frame is located above the engine and the ignition device in the side view of the straddled vehicle. Consequently, the magnetic sensor can be protected from the radio noise of the ignition device suitably.

It is preferred in the straddled vehicle described above that the throttle device includes a throttle body configured to accommodate the throttle valve, and that the throttle body contacts the cylinder head. Accordingly, the throttle body is positioned near the cylinder head (engine). This achieves suitably enhanced performance of the engine.

For the purpose of illustrating the invention, there are shown in the drawings several forms which are presently preferred, it being understood, however, that the invention is not limited to the precise arrangement and instrumentalities shown.

A straddled vehicle <NUM> according to this invention will be described hereinafter with reference to the drawings.

<FIG> is a right side view of a straddled vehicle <NUM> according to one embodiment. The straddled vehicle <NUM> is a dual purpose vehicle, for example. The straddled vehicle <NUM> is also called a dual-sport motorcycle.

<FIG> shows a longitudinal direction X, a transverse direction Y, and an up-down direction Z of the straddled vehicle <NUM>. The longitudinal direction X, transverse direction Y, and up-down direction Z are defined with reference to a driver (also called a rider) mounted on the straddled vehicle <NUM>. The longitudinal direction X, transverse direction Y, and up-down direction Z are perpendicular to one another. The longitudinal direction X and transverse direction Y are horizontal. The up-down direction Z is vertical.

The terms "forward", "rearward", "upward", "downward", "rightward", and "leftward", respectively, mean "forward", "rearward", "upward", "downward", "rightward", and "leftward" as seen from the driver mounted on the straddled vehicle <NUM>. Unless otherwise stated in this specification, "forward" and "rearward" include not only directions parallel to the longitudinal direction X but also directions close to the longitudinal direction X. The directions close to the longitudinal direction X are, for example, directions at angles not exceeding <NUM> degrees to the longitudinal direction X. Similarly, unless otherwise specified, "rightward" and "leftward" include not only directions parallel to the transverse direction Y but also directions close to the transverse direction Y. Unless otherwise specified, "upward" and "downward" include not only directions parallel to the up-down direction Z but also directions close to the up-down direction Z. For reference, the drawings show the terms FRONT, REAR, UP, DOWN, RIGHT, and LEFT, as appropriate.

It is to be understood that, in this specification, various expressions describing arrangements have the following meanings, respectively. The following description will be made taking the transverse direction Y for example, and the same may be applied to the longitudinal direction X and up-down direction Z.

The expression "Member Ma is located more rightward/leftward than Member Mb," defines a position in the transverse direction Y of Member Ma relative to Member Mb, and does not define a position in the longitudinal direction X or the up-down direction Z of Member Ma relative to Member Mb. In the case of this expression, Member Ma may, or may not, overlap Member Mb in a side view of the straddled vehicle <NUM>.

The expression "Member Ma is located rightward/leftward of Member Mb," without reference to a looking direction defines a position in the transverse direction Y of Member Ma relative to Member Mb, a position in the longitudinal direction X of Member Ma relative to Member Mb, and a position in the up-down direction Z of Member Ma relative to Member Mb. This expression means that Member Ma is located more rightward/leftward than Member Mb, and that at least part of Member Ma overlaps at least part of Member Mb in a side view of the straddled vehicle <NUM>.

The expression "Member Ma is located rightward/leftward of Member Mb in plan view of the straddled vehicle <NUM>," defines a position in the transverse direction Y of Member Ma relative to Member Mb, and a position in the longitudinal direction X of Member Ma relative to Member Mb, and does not define a position in the up-down direction Z of Member Ma relative to Member Mb. This expression means that Member Ma is located more rightward/leftward than Member Mb, and that a front end of Member Ma is located more forward than a rear end of Member Mb, and that a rear end of Member Ma is located more rearward than a front end of Member Mb.

The expression "Member Ma is located rightward/leftward of Member Mb in front view of the straddled vehicle <NUM>," defines a position in the transverse direction Y of Member Ma relative to Member Mb, and a position in the up-down direction Z of Member Ma relative to Member Mb, and does not define a position in the longitudinal direction X of Member Ma relative to Member Mb. This expression means that: Member Ma is located more rightward/leftward than Member Mb, an upper end of Member Ma is located higher than a lower end of Member Mb, and a lower end of Member Ma is located lower than an upper end of Member Mb.

In the present specification, the language "in side view of the straddled vehicle <NUM>" is referred to as "in side view of the vehicle", as appropriate. Likewise, the language "in plan view of the straddled vehicle <NUM>" is referred to as "in plan view of the vehicle", as appropriate. The language "in front view of the straddled vehicle <NUM>" is referred to as "in front view of the vehicle", as appropriate.

The straddled vehicle <NUM> includes a body frame <NUM>, and a steering device <NUM>. The steering device <NUM> is supported by the body frame <NUM>. The steering device <NUM> is rotatable relative to the body frame <NUM>.

The steering device <NUM> includes an accelerator grip <NUM>.

The straddled vehicle <NUM> includes a front wheel <NUM>. The front wheel <NUM> is supported by the steering device <NUM>.

The straddled vehicle <NUM> includes an engine <NUM>. The engine <NUM> is supported by the body frame <NUM>. The engine <NUM> is fixed to the body frame <NUM>. The engine <NUM> is unrockable relative to the body frame <NUM>.

The straddled vehicle <NUM> includes an engine fastening portion <NUM>. The engine fastening portion <NUM> fastens the engine <NUM> to the body frame <NUM>. The engine fastening portion <NUM> is a bolt, for example. Accordingly, the engine <NUM> is immovable relative to the body frame <NUM>.

Here, the engine <NUM> is fastened to the body frame <NUM> at a plurality of positions in addition to the position of the engine fastening portion <NUM> shown in <FIG>.

The straddled vehicle <NUM> includes a seat <NUM>. The seat <NUM> is located behind the steering device <NUM> in the side view of the vehicle.

The straddled vehicle <NUM> includes a rear arm <NUM>. The rear arm <NUM> is located behind the engine <NUM> in the side view of the vehicle. The rear arm <NUM> is supported by the body frame <NUM>. The rear arm <NUM> is swingable relative to the body frame <NUM>.

The straddled vehicle <NUM> includes a rear wheel <NUM>. The rear wheel <NUM> is supported by the rear arm <NUM>.

The driver of the straddled vehicle <NUM> sits astride the seat <NUM>. The driver steers the steering device <NUM>. The driver operates the accelerator grip <NUM>.

<FIG> is a right side view of the body frame <NUM> and the engine <NUM>. The body frame <NUM> includes a head tube <NUM>. The head tube <NUM> is located higher and more forward than the engine <NUM> in the side view of the vehicle. The head tube <NUM> supports the steering device <NUM>.

The body frame <NUM> includes a main frame <NUM>. The main frame <NUM> is connected to the head tube <NUM>. The main frame <NUM> extends rearward and downward from the head tube <NUM>.

At least part of the main frame <NUM> is located above the engine <NUM> in the side view of the vehicle. The main frame <NUM> may or may not overlap the engine <NUM> in the side view of the vehicle.

The main frame <NUM> passes a position above the engine <NUM>, and extends from a position more forward than the engine <NUM> to a position more rearward than the engine <NUM> in the side view of the vehicle.

The main frame <NUM> is coupled to the engine <NUM>. The main frame <NUM> fixes the engine <NUM>. The engine fastening portion <NUM> fastens the main frame <NUM> to the engine <NUM>.

<FIG> is a plan view of the body frame <NUM> and the engine <NUM>. <FIG> shows the main frame <NUM> with dotted lines. The main frame <NUM> extends from a position more forward than the engine <NUM> to a position more rearward than the engine <NUM> in the plan view of the vehicle.

The main frame <NUM> includes a right main frame 5R and a left main frame <NUM>. The left main frame <NUM> is located leftward of the right main frame 5R.

At least part of the engine <NUM> is located leftward of the right main frame 5R in the plan view of the vehicle. At least part of the engine <NUM> is located rightward of the left main frame <NUM> in the plan view of the vehicle.

The right main frame 5R extends from a position more forward than the engine <NUM> to a position more rearward than the engine <NUM> in the plan view of the vehicle. The left main frame <NUM> extends from a position more forward than the engine <NUM> to a position more rearward than the engine <NUM> in the plan view of the vehicle.

The right main frame 5R is shown in <FIG>. The left main frame <NUM> overlaps the right main frame 5R in the side view of the vehicle, which illustration is omitted.

Reference is now made to <FIG>. <FIG> is a left side view of the engine <NUM>.

The engine <NUM> includes a crankcase <NUM>. The crankcase <NUM> accommodates a crankshaft not shown. The crankcase <NUM> is fastened to the body frame <NUM> by the engine fastening portion <NUM>.

The engine <NUM> includes a cylinder unit <NUM>. The cylinder unit <NUM> is provided above the crankcase <NUM>. The cylinder unit <NUM> is connected to the crankcase <NUM>.

The cylinder unit <NUM> extends forward and upward.

The cylinder unit <NUM> extends along a cylinder axis B. The cylinder axis B is an imaginary straight line. The cylinder axis B extends forward and upward in the side view of the vehicle.

Reference is made to <FIG>. The cylinder axis B forms an angle θ with respect to a horizontal line H in the side view of the vehicle. The angle θ is <NUM> degrees or larger. The horizontal line H is an imaginary line that is parallel to the longitudinal direction X in the side view of the vehicle.

Reference is made to <FIG>. The cylinder axis B is parallel to the longitudinal direction X in the plan view of the vehicle.

The cylinder axis B is located leftward of the right main frame 5R in the plan view of the vehicle. The cylinder axis B is located rightward of the left main frame <NUM> in the plan view of the vehicle.

Reference is now made to <FIG>. The cylinder unit <NUM> includes a cylinder member <NUM>, a cylinder head <NUM>, and a head cover <NUM>. The cylinder head <NUM> is provided above the cylinder member <NUM>. The head cover <NUM> is provided above the cylinder head <NUM>.

The cylinder member <NUM> is connected to the crankcase <NUM>.

The cylinder head <NUM> is connected to the cylinder member <NUM>. The head cover <NUM> is connected to the cylinder head <NUM>.

<FIG> is a sectional view of the engine <NUM>. <FIG> is a sectional view taken on a plane orthogonal to a transverse direction Y. The cylinder head <NUM> contacts the cylinder member <NUM>. The head cover <NUM> contacts the cylinder head <NUM>. The cylinder member <NUM> contacts the crankcase <NUM>, which illustration is omitted.

The cylinder member <NUM> has a cylinder bore <NUM>. The cylinder bore <NUM> is a space. The cylinder bore <NUM> is formed inside the cylinder member <NUM>. The cylinder bore <NUM> extends on the cylinder axis B. The cylinder bore <NUM> centers on the cylinder axis B. The cylinder bore <NUM> is of a cylindrical shape.

The engine <NUM> includes a piston <NUM>. The piston <NUM> is accommodated in the cylinder member <NUM>. The piston <NUM> is located in the cylinder bore <NUM>. The piston <NUM> is coupled to the crankshaft described above.

The cylinder head <NUM> covers an upper part of the cylinder bore <NUM>. The cylinder member <NUM>, the piston <NUM>, and the cylinder head <NUM> define a combustion chamber <NUM>. The combustion chamber <NUM> corresponds to a part of the cylinder bore <NUM> positioned higher than the piston <NUM>.

The cylinder head <NUM> has an intake passage <NUM>. The intake passage <NUM> is a space. The intake passage <NUM> is formed inside the cylinder head <NUM>. The intake passage <NUM> is in communication with the combustion chamber <NUM>. The intake passage <NUM> supplies fuel-air mixture to the combustion chamber <NUM>.

The intake passage <NUM> is located above the combustion chamber <NUM>. The intake passage <NUM> is located more rearward than the cylinder axis B in the side view of the vehicle. The intake passage <NUM> extends rearward from the combustion chamber <NUM>. The intake passage <NUM> extends to a rear part of the cylinder head <NUM>. Here, the rear part of the cylinder head <NUM> is a region of the cylinder head <NUM> positioned behind the cylinder axis B.

The cylinder head <NUM> includes an exhaust passage <NUM>. The exhaust passage <NUM> is a space. The exhaust passage <NUM> is formed inside the cylinder head <NUM>. The exhaust passage <NUM> is in communication with the combustion chamber <NUM>. The exhaust passage <NUM> discharges combustion gas from the combustion chamber <NUM>.

The exhaust passage <NUM> is located above the combustion chamber <NUM>. The exhaust passage <NUM> is located more forward than the intake passage <NUM>. The exhaust passage <NUM> is located more forward than the cylinder axis B in the side view of the vehicle. The exhaust passage <NUM> extends forward from the combustion chamber <NUM>. The exhaust passage <NUM> extends to a front part of the cylinder head <NUM>. Here, the front part of the cylinder head <NUM> is a region of the cylinder head <NUM> positioned in front of the cylinder axis B.

The cylinder unit <NUM> includes an inlet valve <NUM> and an exhaust valve <NUM>. The inlet valve <NUM> is located in the intake passage <NUM>. The inlet valve <NUM> opens and closes the intake passage <NUM>. The exhaust valve <NUM> is located in the exhaust passage <NUM>. The exhaust valve <NUM> opens and closes the exhaust passage <NUM>.

Reference is made to <FIG>. The straddled vehicle <NUM> includes a throttle device <NUM>. The throttle device <NUM> controls an intake air amount of the engine <NUM>.

The throttle device <NUM> is located behind the cylinder head <NUM>. For example, the throttle device <NUM> is entirely located behind the cylinder head <NUM>. The throttle device <NUM> overlaps cylinder head <NUM> in rear view of the vehicle, which illustration is omitted.

The throttle device <NUM> is connected to the cylinder head <NUM>. The throttle device <NUM> is connected to the rear part of the cylinder head <NUM>. The throttle device <NUM> extends rearward from the cylinder head <NUM>.

The throttle device <NUM> is located more rearward than the head cover <NUM>. For example, the throttle device <NUM> is entirely located more rearward than the head cover <NUM>.

The throttle device <NUM> is connected to an air cleaner, not shown, for example. The throttle device <NUM> controls an amount of air to be fed from the air cleaner to the engine <NUM>.

Reference is made to <FIG>. At least part of the throttle device <NUM> is located below the main frame <NUM> in the side view of the vehicle. In other words, at least part of the main frame <NUM> is located above the throttle device <NUM> in the side view of the vehicle. The throttle device <NUM> may or may not overlap the main frame <NUM> in the side view of the vehicle.

The main frame <NUM> extends from a position more forward than the throttle device <NUM> to a position more rearward than the throttle device <NUM> in the side view of the vehicle. More specifically, the main frame <NUM> passes a position above the throttle device <NUM>, and extends from a position more forward than the throttle device <NUM> to a position more rearward than the throttle device <NUM> in the side view of the vehicle. The main frame <NUM> extends from a position more forward and higher than the throttle device <NUM> to a position more rearward and lower than the throttle device <NUM> in the side view of the vehicle. The engine fastening portion <NUM> is located more rearward and lower than the throttle device <NUM>.

The throttle device <NUM> is entirely located behind the cylinder axis B in the side view of the vehicle. In other words, the throttle device <NUM> is entirely located more rearward than the cylinder axis B in the side view of the vehicle.

Reference is made to <FIG>. The main frame <NUM> extends from a position more forward than the throttle device <NUM> to a position more rearward than the throttle device <NUM> in the plan view of the vehicle.

The right main frame 5R is located rightward of the throttle device <NUM> in the plan view of the vehicle. The right main frame 5R passes a position rightward of the throttle device <NUM>, and extends from a position more forward than the throttle device <NUM> to a position more rearward than the throttle device <NUM> in the plan view of the vehicle. The left main frame <NUM> is located leftward of the throttle device <NUM> in the plan view of the vehicle. The left main frame <NUM> passes a position leftward of the throttle device <NUM>, and extends from a position more forward than the throttle device <NUM> to a position more rearward than the throttle device <NUM> in the plan view of the vehicle.

The throttle device <NUM> is located on the cylinder axis B in the plan view of the vehicle.

Reference is made to <FIG>. The head cover <NUM> has an upper end 29a. At least part of the throttle device <NUM> is located lower than the upper end 29a of the head cover <NUM>. For example, the throttle device <NUM> is entirely located lower than the upper end 29a.

Reference is made to <FIG>. The throttle device <NUM> contacts the cylinder head <NUM>. The throttle device <NUM> is connected in communication with the intake passage <NUM>.

The cylinder bore <NUM> has a rear edge 24a in the side view of the vehicle. <FIG> shows an extension E. Here, the extension E corresponds to an imaginary line obtained by extending the rear edge 24a of the cylinder bore <NUM>. The extension E is parallel to the cylinder axis B. The extension E is located at a position where the cylinder axis B is shifted rearward. The throttle device <NUM> is entirely located behind the extension E in the side view of the vehicle. The throttle device <NUM> is entirely located more rearward than the extension E in the side view of the vehicle.

The throttle device <NUM> includes a throttle body <NUM>. The throttle body <NUM> is connected to the cylinder head <NUM>. The throttle body <NUM> contacts the cylinder head <NUM>.

The throttle body <NUM> includes an intake passage <NUM>. The intake passage <NUM> is a space. The intake passage <NUM> is formed inside the throttle body <NUM>. The intake passage <NUM> is in communication with the intake passage <NUM>.

The throttle device <NUM> includes a throttle valve <NUM>. The throttle valve <NUM> is accommodated in the throttle body <NUM>. The throttle valve <NUM> is located in the intake passage <NUM>.

The throttle valve <NUM> is supported by the throttle body <NUM>. The throttle valve <NUM> is movable relative to the throttle body <NUM>. The throttle valve <NUM> opens and closes the intake passage <NUM>. The throttle valve <NUM> changes a sectional area of the intake passage <NUM>. The throttle valve <NUM> changes an amount of air flowing through the intake passage <NUM>.

The throttle valve <NUM> is a butterfly valve, for example. The throttle valve <NUM> is rotatable relative to the throttle body <NUM>, for example. Rotation of the throttle valve <NUM> changes the sectional area of the intake passage <NUM>.

The throttle device <NUM> includes a valve shaft <NUM>, for example. The valve shaft <NUM> is supported by the throttle body <NUM>. The valve shaft <NUM> is movable relative to the throttle body <NUM>. The valve shaft <NUM> supports the throttle valve <NUM>. The throttle valve <NUM> rotates integrally with the valve shaft <NUM>. The throttle valve <NUM> rotates when the valve shaft <NUM> rotates relative to the throttle body <NUM>.

The throttle valve <NUM> moves in accordance with an amount of operation of the accelerator grip <NUM>. The straddled vehicle <NUM> includes an accelerator operation transmitting device, not shown, for example. The accelerator operation transmitting device transmits the amount of operation of the accelerator grip <NUM> to the throttle valve <NUM>.

The throttle device <NUM> may be classified as a mechanical throttle or an electronically controlled throttle. As for the mechanical throttle, the throttle valve <NUM> is mechanically coupled to the accelerator grip <NUM>. If the throttle device <NUM> is classified as the mechanical throttle, the accelerator operation transmitting device includes a member (including at least any of a wire, cable, or link mechanism, for example) for mechanically coupling the accelerator grip <NUM> to the throttle valve <NUM>. If the throttle device <NUM> is classified as the electronically controlled throttle, the accelerator operation transmitting device includes an accelerator sensor, an actuator, and a controller, which are each not shown. The accelerator sensor detects the amount of operation of the accelerator grip <NUM>. The actuator actuates the throttle valve <NUM>. The controller controls the actuator in accordance with detection results of the accelerator sensor.

Reference is made to <FIG>. The throttle device <NUM> includes a magnetic sensor <NUM>. <FIG> shows the magnetic sensor <NUM> with dotted lines. The magnetic sensor <NUM> is accommodated in the throttle body <NUM>, for example.

The magnetic sensor <NUM> detects a position of the throttle valve <NUM>. The magnetic sensor <NUM> detects a degree of opening of the throttle valve <NUM>.

The magnetic sensor <NUM> senses a magnetic field. The magnetic sensor <NUM> senses a magnetic field, thereby detecting the position of the throttle valve <NUM>. The magnetic sensor <NUM> detects the position of the throttle valve <NUM> without contacting the throttle valve <NUM>.

The magnetic sensor <NUM> includes, for example, at least one of a Hall element, a Hall IC, and a magnetoresistive element.

The throttle device <NUM> includes a magnetic field forming device, not shown, for example. The magnetic field forming device is arranged in the vicinity of the magnetic sensor <NUM>. The magnetic field forming device forms a magnetic field in the vicinity of the magnetic sensor <NUM>. The magnetic sensor <NUM> senses the magnetic field formed by the magnetic field forming device. The magnetic field formed by the magnetic field forming device corresponds to the magnetic field sensed by the magnetic sensor <NUM>. The magnetic field forming device is, for example, a magnet. The magnet is attached to either the throttle valve <NUM> or the valve shaft <NUM>, for example. The magnet moves integrally with the throttle valve <NUM>, for example. The magnet rotates integrally with the throttle valve <NUM>, for example.

Part of the description about arrangement of the throttle device <NUM> described above is applied to arrangement of the magnetic sensor <NUM>. The magnetic sensor <NUM> is located behind the cylinder head <NUM>, for example. The magnetic sensor <NUM> is entirely located behind the cylinder head <NUM>. The magnetic sensor <NUM> is located more rearward than the head cover <NUM>. The magnetic sensor <NUM> is entirely located more rearward than the head cover <NUM>. At least part of the magnetic sensor <NUM> is located lower than the upper end 29a of the head cover <NUM>. The magnetic sensor <NUM> is entirely located behind the cylinder axis B in the side view of the vehicle. The magnetic sensor <NUM> is entirely located more rearward than the cylinder axis B in the side view of the vehicle. The magnetic sensor <NUM> is entirely located behind the extension E in the side view of the vehicle. The magnetic sensor <NUM> is entirely located more rearward than the extension E in the side view of the vehicle.

The straddled vehicle <NUM> further includes a fuel injector <NUM>. The fuel injector <NUM> is attached to the throttle device <NUM>, for example. The fuel injector <NUM> injects fuel to the intake passage <NUM>, for example. The fuel injected from the fuel injector <NUM> is mixed with air flowing through the throttle device <NUM> to form a fuel-air mixture. The fuel-air mixture passes through the intake passage <NUM> of the cylinder head <NUM> into the combustion chamber <NUM>. Here, instead of injecting fuel to the intake passage <NUM>, the fuel injector <NUM> may inject fuel to the intake passage <NUM>.

Reference is made to <FIG>. The straddled vehicle <NUM> includes an ignition device <NUM>. The ignition device <NUM> includes a spark plug <NUM>, a plug cord <NUM>, and an ignition coil <NUM>. The spark plug <NUM> is shown in <FIG>.

The plug cord <NUM> is connected to the spark plug <NUM>. The ignition coil <NUM> is connected to the plug cord <NUM>.

The ignition coil <NUM> is a high-voltage component. The ignition coil <NUM> generates a high voltage. The ignition coil <NUM> generates a high voltage current. The plug cord <NUM> transmits the high voltage current generated by the ignition coil <NUM>. The plug cord <NUM> supplies the high voltage current to the spark plug <NUM>. The spark plug <NUM> ignites the fuel-air mixture in the combustion chamber <NUM>.

The number of spark plugs <NUM> of the ignition device <NUM> is one. The number of plug cords <NUM> of the ignition device <NUM> is one. The number of ignition coils <NUM> of the ignition device <NUM> is one.

Reference is made to <FIG> and <FIG>. The plug cord <NUM> includes a first end 65a, and a second end 65b. The first end 65a is electrically connected to the ignition coil <NUM>. The second end 65b is electrically connected to the spark plug <NUM>. The second end 65b will hereinafter be called the "plug cap 65b". In <FIG> and <FIG>, a position of the plug cap 65b substantially corresponds to a position of the spark plug <NUM>.

Reference is made to <FIG>. At least part of the ignition device <NUM> is located below the main frame <NUM> in the side view of the vehicle. In other words, at least part of the main frame <NUM> is located above the ignition device <NUM> in the side view of the vehicle. The ignition device <NUM> may or may not overlap the main frame <NUM> in the side view of the vehicle.

The main frame <NUM> extends from a position more forward than the ignition device <NUM> to a position more rearward than the ignition device <NUM> in the side view of the vehicle. More specifically, the main frame <NUM> passes above the ignition device <NUM>, and extends from a position more forward than the ignition device <NUM> to a position more rearward than the ignition device <NUM> in the side view of the vehicle. The main frame <NUM> extends from a position more forward and higher than the ignition device <NUM> to a position more rearward and lower than the ignition device <NUM> in the side view of the vehicle. The engine fastening portion <NUM> is located more rearward and lower than the ignition device <NUM>.

The ignition device <NUM> is located more forward than the throttle device <NUM>. The ignition device <NUM> is entirely located more forward than the throttle device <NUM>. The ignition device <NUM> is located more forward than the magnetic sensor <NUM>. The ignition device <NUM> is entirely located more forward than the magnetic sensor <NUM>.

Reference is made to <FIG>. The main frame <NUM> extends from a position more forward than the ignition device <NUM> to a position more rearward than the ignition device <NUM> in the plan view of the vehicle.

At least part of the ignition device <NUM> overlaps the main frame <NUM> in the plan view of the vehicle.

Reference is made to <FIG>. The ignition device <NUM> is entirely located in front of the extension E in the side view of the vehicle. The ignition device <NUM> is entirely located more forward than the extension E in the side view of the vehicle.

Reference is made to <FIG>. The spark plug <NUM> is attached to the cylinder head <NUM>. The spark plug <NUM> is supported by the cylinder head <NUM>.

The spark plug <NUM> is attached to a right part of the cylinder head <NUM>. Here, the right part of the cylinder head <NUM> is a region of the cylinder head <NUM> positioned rightward of the cylinder axis B. The right part of the cylinder head <NUM> is shown in <FIG>.

Reference is made to <FIG>. The spark plug <NUM> is entirely located rightward of the cylinder axis B in the plan view of the vehicle. The spark plug <NUM> is entirely located more rightward than the cylinder axis B in the plan view of the vehicle. The spark plug <NUM> does not cross the cylinder axis B in the plan view of the vehicle.

An area rightward of the cylinder axis B in the plan view of the vehicle is referred to as a "right area AR" as appropriate. The right area AR is located more rightward than the cylinder axis B. The spark plug <NUM> is entirely located in the right area AR in the plan view of the vehicle.

Reference is made to <FIG>. The spark plug <NUM> passes through the right part of the cylinder head <NUM>. The spark plug <NUM> is inserted into the cylinder head <NUM>. The spark plug <NUM> reaches the combustion chamber <NUM>.

The spark plug <NUM> contacts the cylinder head <NUM>. The spark plug <NUM> is electrically connected to the cylinder head <NUM>. The cylinder head <NUM> has conductivity. The cylinder head <NUM> is electrically connected to the head cover <NUM>. The head cover <NUM> also has conductivity. Consequently, the spark plug <NUM> is electrically connected to the head cover <NUM>.

The spark plug <NUM> overlaps the cylinder axis B in the side view of the vehicle.

The spark plug <NUM> is entirely located in front of the extension E in the side view of the vehicle. The spark plug <NUM> is entirely located more forward than the extension E in the side view of the vehicle.

The spark plug <NUM> is entirely located more forward than the throttle device <NUM>. In other words, the throttle device <NUM> is entirely located more rearward than the spark plug <NUM>. The spark plug <NUM> is entirely located more forward than the magnetic sensor <NUM>. In other words, the magnetic sensor <NUM> is entirely located more rearward than the spark plug <NUM>.

At least part of the spark plug <NUM> is located lower than the throttle device <NUM>. In other words, at least part of the throttle device <NUM> is located higher than the spark plug <NUM>.

Reference is made to <FIG>. At least part of the ignition coil <NUM> overlaps the head cover <NUM> in the plan view of the vehicle. For example, the ignition coil <NUM> entirely overlaps the head cover <NUM> in the plan view of the vehicle.

The ignition coil <NUM> is entirely located leftward of the cylinder axis B in the plan view of the vehicle. The ignition coil <NUM> is entirely located more leftward than the cylinder axis B in the plan view of the vehicle. The ignition coil <NUM> does not cross the cylinder axis B in the plan view of the vehicle.

An area leftward of the cylinder axis B in the plan view of the vehicle is referred to as a "left area AL" as appropriate. The left area AL is located more leftward than the cylinder axis B. The ignition coil <NUM> is entirely located in the left area AL in the plan view of the vehicle.

Reference is made to <FIG>. At least part of the ignition coil <NUM> is located in front of the cylinder axis B in the side view of the vehicle. At least part of the ignition coil <NUM> is located more forward than the cylinder axis B. For example, the ignition coil <NUM> is entirely located in front of the cylinder axis B in the side view of the vehicle. For example, the ignition coil <NUM> is entirely located more forward than the cylinder axis B in the side view of the vehicle.

The ignition coil <NUM> is entirely located more forward than the throttle device <NUM>. The ignition coil <NUM> is entirely located more forward than the magnetic sensor <NUM>.

The head cover <NUM> has a front end 29b. At least part of the ignition coil <NUM> is located more rearward than the front end 29b. For example, the ignition coil <NUM> is entirely located more rearward than the front end 29b.

<FIG> shows a first imaginary line F. The first imaginary line F passes the front end 29b and is parallel to the up-down direction Z in the side view of the vehicle. At least part of the ignition coil <NUM> is located behind the first imaginary line F in the side view of the vehicle. For example, the ignition coil <NUM> is entirely located behind the first imaginary line F in the side view of the vehicle. For example, the ignition coil <NUM> is entirely located more rearward than the first imaginary line F in the side view of the vehicle. For example, the ignition coil <NUM> does not overlap the first imaginary line F in the side view of the vehicle.

The ignition coil <NUM> is entirely located higher than the cylinder head <NUM>.

At least part of the ignition coil <NUM> is located above the head cover <NUM>. For example, the ignition coil <NUM> is entirely located above the head cover <NUM>.

At least part of the ignition coil <NUM> is located higher than the upper end 29a of the head cover <NUM>. For example, the ignition coil <NUM> is entirely located higher than the upper end 29a.

At least part of the ignition coil <NUM> is located higher than the throttle device <NUM>. For example, the ignition coil <NUM> is entirely located higher than the throttle device <NUM>. At least part of the ignition coil <NUM> is located higher than the magnetic sensor <NUM>. For example, the ignition coil <NUM> is entirely located higher than the magnetic sensor <NUM>.

Reference is made to <FIG>. The ignition coil <NUM> is entirely located more forward than the spark plug <NUM>.

The ignition coil <NUM> is entirely located higher than the spark plug <NUM>.

The ignition coil <NUM> is entirely located in front of the extension E in the side view of the vehicle. The ignition coil <NUM> is entirely located more forward than the extension E in the side view of the vehicle.

<FIG> is a front view of the engine <NUM>. At least part of the ignition coil <NUM> overlaps the head cover <NUM> in the front view of the vehicle.

<FIG> is a perspective view of the ignition coil <NUM>. The ignition coil <NUM> includes a casing <NUM>. The casing <NUM> has a substantially cylindrical shape. The casing <NUM> accommodates an iron core, a primary coil, and a secondary coil, which are each not shown. The primary coil and the secondary coil are wound around the iron core. The primary coil and the secondary coil are wound concentrically. For example, the primary coil is wound outward of iron core. For example, the secondary coil is wound outward of the primary coil. The iron core, the primary coil, and the secondary coil are electrically insulated from one another.

The ignition coil <NUM> includes a secondary terminal <NUM>. The secondary terminal <NUM> is attached to the casing <NUM>. The secondary terminal <NUM> is electrically connected to the secondary coil.

The secondary terminal <NUM> is connected to the plug cord <NUM>. The secondary terminal <NUM> is electrically connected to the plug cord <NUM>.

The secondary terminal <NUM> is electrically connected to the first end 65a of the plug cord <NUM>.

The ignition coil <NUM> includes one or more (e.g., two) flanges <NUM>. The flanges <NUM> are attached to the casing <NUM>.

The flange <NUM> is of a plate shape, for example. The flange <NUM> is of a bar shape, for example.

One flange <NUM> extends rightward from the casing <NUM>. The other flange <NUM> extends leftward from the casing <NUM>.

The flanges <NUM> have conductivity, for example.

The flanges <NUM> are electrically connected to the iron core, for example. The flanges <NUM> are formed integrally with the iron core, for example.

Reference is made to <FIG>. The plug cord <NUM> is located at a position equal to or lower than the ignition coil <NUM> in the up-down direction Z. The plug cord <NUM> has no portion located higher than the ignition coil <NUM>.

The plug cord <NUM> is located at a position equal to or higher than the spark plug <NUM> in the up-down direction Z. The plug cord <NUM> has no portion located lower than the spark plug <NUM>.

The plug cord <NUM> is located at a position equal to or more forward than the spark plug <NUM> in the longitudinal direction X. The plug cord <NUM> has no portion located more rearward than the spark plug <NUM>. Accordingly, the plug cord <NUM> is entirely located in front of the extension E in the side view of the vehicle, which illustration is omitted. The plug cord <NUM> is entirely located more forward than the extension E in the side view of the vehicle. The position of the spark plug <NUM> corresponds to a rear end of the ignition device <NUM>.

Reference is made to <FIG>. At least part of the plug cord <NUM> overlaps the head cover <NUM>. At least part of the plug cord <NUM> is located above the head cover <NUM>.

The plug cord <NUM> is located in both the right area AR and the left area AL. The plug cord <NUM> extends from the right area AR to the left area AL.

The plug cord <NUM> is located at a position equal to or more rearward than the ignition coil <NUM> in the longitudinal direction X. The plug cord <NUM> has no portion located more forward than the ignition coil <NUM>.

The position of the ignition coil <NUM> corresponds to a front end of the ignition device <NUM>. Accordingly, the ignition device <NUM> is entirely located more rearward than the front end 29b of the head cover <NUM> in the side view of the vehicle, for example.

The plug cord <NUM> is located at a position equal to or more rightward than the ignition coil <NUM> in the transverse direction Y. The plug cord <NUM> has no portion located more leftward than the ignition coil <NUM>.

The plug cord <NUM> is entirely located more forward than the throttle device <NUM>. The plug cord <NUM> is entirely located more forward than the magnetic sensor <NUM>.

Reference is made to <FIG>. At least part of the plug cord <NUM> is located more rearward than the front end 29b of the head cover <NUM>. For example, the plug cord <NUM> is entirely located more rearward than the front end 29b.

At least part of the plug cord <NUM> is located behind the first imaginary line F in the side view of the vehicle. For example, the plug cord <NUM> is entirely located behind the first imaginary line F in the side view of the vehicle.

Reference is made to <FIG>. The first end 65a of the plug cord <NUM> extends rightward from the ignition coil <NUM>.

Reference is made to <FIG>. The plug cap 65b of the plug cord <NUM> extends upward from the spark plug <NUM>. More specifically, the plug cap 65b extends upward and forward from the spark plug <NUM>. Reference is made to <FIG> and <FIG>. The plug cap 65b extends upward, forward, and rightward from the spark plug <NUM>.

The plug cord <NUM> is curved. The plug cord <NUM> is curved with a relatively large radius of curvature.

Specifically, the plug cord <NUM> has a curved section 65c. The curved section 65c is positioned between the first end 65a and the plug cap 65b. The curved section 65c bends downward and rearward from the first end 65a in the side view of the vehicle. Then, the curved section 65c reaches the plug cap 65b.

Reference is made to <FIG>. The curved section 65c is curved convexly rightward in the plan view of the vehicle.

The plug cord <NUM> is supported only by the spark plug <NUM> and ignition coil <NUM>. That is, the plug cord <NUM> is not supported by any support members (e.g. clamp members) other than the spark plug <NUM> and ignition coil <NUM>.

The plug cord <NUM> does not contact the body frame <NUM>. The plug cord <NUM> does not contact the main frame <NUM>. The plug cord <NUM> does not contact the engine <NUM>.

Reference is made to <FIG>. The straddled vehicle <NUM> includes a supporting portion <NUM>. The supporting portion <NUM> supports the ignition coil <NUM>. The supporting portion <NUM> supports the flange <NUM>. The supporting portion <NUM> is connected to the flange <NUM>.

The supporting portion <NUM> is supported by the head cover <NUM>. The supporting portion <NUM> is connected to the head cover <NUM>.

Reference is made to <FIG>. At least part of the supporting portion <NUM> overlaps the head cover <NUM> in the plan view of the vehicle. For example, the supporting portion <NUM> entirely overlaps the head cover <NUM>.

The supporting portion <NUM> is entirely located leftward of the cylinder axis B in the plan view of the vehicle. The supporting portion <NUM> is entirely located in the left area AL in the plan view of the vehicle.

Reference is made to <FIG>. At least part of the supporting portion <NUM> is located in front of the cylinder axis B in the side view of the vehicle. At least part of the supporting portion <NUM> is located more forward than the cylinder axis B in the side view of the vehicle. For example, the supporting portion <NUM> is entirely located in front of the cylinder axis B in the side view of the vehicle. For example, the supporting portion <NUM> is entirely located more forward than the cylinder axis B in the side view of the vehicle.

The supporting portion <NUM> is entirely located more forward than the throttle device <NUM>. The supporting portion <NUM> is entirely located more forward than the magnetic sensor <NUM>.

At least part of the supporting portion <NUM> is located more rearward than the front end 29b. For example, the supporting portion <NUM> is entirely located more rearward than the front end 29b.

At least part of the supporting portion <NUM> is located behind the first imaginary line F in the side view of the vehicle. For example, the supporting portion <NUM> is entirely located behind the first imaginary line F in the side view of the vehicle.

The supporting portion <NUM> is entirely located higher than the cylinder head <NUM>.

At least part of the supporting portion <NUM> is located above the head cover <NUM>.

At least part of the supporting portion <NUM> is located higher than the upper end 29a of the head cover <NUM>.

The supporting portion <NUM> extends upward and forward from the head cover <NUM>.

The supporting portion <NUM> extends to a position higher than the upper end 29a of the head cover <NUM>.

At least part of the supporting portion <NUM> is located higher than the throttle device <NUM>. For example, the supporting portion <NUM> is entirely located higher than the throttle device <NUM>.

<FIG> is a sectional view of the supporting portion <NUM>. The supporting portion <NUM> contacts the head cover <NUM>.

The supporting portion <NUM> contacts the flanges <NUM>.

The supporting portion <NUM> electrically connects the head cover <NUM> to the flanges <NUM>.

The supporting portion <NUM> has conductivity.

Reference is made to <FIG> and <FIG>. The supporting portion <NUM> includes one or more (e.g., two) bosses <NUM>. The bosses <NUM> are connected to the head cover <NUM>.

The bosses <NUM> contact the head cover <NUM>.

The bosses <NUM> are formed integrally with the head cover <NUM>, for example. The bosses <NUM> are not separable from the head cover <NUM>.

The bosses <NUM> extend upward and forward from the head cover <NUM>.

The supporting portion <NUM> includes one or more (e.g., two) fastening portions <NUM>. The fastening portions <NUM> fasten the flanges <NUM> to the bosses <NUM> individually.

Specifically, the fastening portion <NUM> is screwed into the boss <NUM>. The fastening portion <NUM> and the boss <NUM> contact each other. The fastening portion <NUM> presses the flange <NUM> against the boss <NUM>. The flange <NUM> and the boss <NUM> contact each other. The flange <NUM> and the fastening portion <NUM> contact each other. The fastening portion <NUM> is, for example, a bolt.

The bosses <NUM> electrically connect the head cover <NUM> to the flanges <NUM>. The bosses <NUM> and the fastening portions <NUM> electrically connect the head cover <NUM> to the flanges <NUM>.

The boss <NUM> has conductivity. The fastening portion <NUM> also has conductivity.

The straddled vehicle <NUM> has the body frame <NUM> and the engine <NUM>. The engine <NUM> is fixed to the body frame <NUM>. The engine <NUM> includes the cylinder member <NUM>, the cylinder head <NUM>, and the head cover <NUM>. The cylinder member <NUM> has the cylinder bore <NUM>. The cylinder bore <NUM> centers on the cylinder axis B. The cylinder head <NUM> is provided above the cylinder member <NUM>. The head cover <NUM> is provided above the cylinder head <NUM>.

The straddled vehicle <NUM> includes the throttle device <NUM>. The throttle device <NUM> controls the intake air amount of the engine <NUM>. The throttle device <NUM> is located behind the cylinder head <NUM>. The throttle device <NUM> includes the throttle valve <NUM> and the magnetic sensor <NUM>. The magnetic sensor <NUM> detects the position of the throttle valve <NUM>.

The straddled vehicle <NUM> includes the ignition device <NUM>. The ignition device <NUM> includes the spark plug <NUM>, the plug cord <NUM>, and the ignition coil <NUM>. The spark plug <NUM> is attached to the cylinder head <NUM>. The plug cord <NUM> is connected to the spark plug <NUM>. The ignition coil <NUM> is connected to the plug cord <NUM>.

The ignition coil <NUM> includes the casing <NUM>, the secondary terminal <NUM>, and the flanges <NUM>. The secondary terminal <NUM> is attached to the casing <NUM>. The secondary terminal <NUM> is connected to the plug cord <NUM>. The flanges <NUM> are attached to the casing <NUM>.

The straddled vehicle <NUM> includes the supporting portion <NUM>. The supporting portion <NUM> supports the ignition coil <NUM>. The supporting portion <NUM> is connected to the flange <NUM>. The supporting portion <NUM> is supported by the head cover <NUM>. Accordingly, the ignition coil <NUM> is supported by the head cover <NUM> via the supporting portion <NUM>. As described above, the spark plug <NUM> is attached to the cylinder head <NUM>. Accordingly, the ignition coil <NUM> and the spark plug <NUM> are both supported by the engine <NUM>. The ignition coil <NUM> and the spark plug <NUM> both receive vibration of the engine <NUM>. This can effectively suppress a difference in vibration between the ignition coil <NUM> and the spark plug <NUM>. Accordingly, the ignition device <NUM> can be installed more appropriately.

The head cover <NUM> is lower in temperature than the cylinder member <NUM> and the cylinder head <NUM>. Accordingly, the ignition coil <NUM> can be protected suitably from the heat of the engine <NUM>. This can install the ignition device <NUM> more appropriately.

As described above, the throttle device <NUM> is located behind the cylinder head <NUM>. At least part of the ignition coil <NUM> is located in front of the cylinder axis B in the side view of the vehicle. Accordingly, the magnetic sensor <NUM> can be sufficiently spaced apart from the ignition coil <NUM>. In other words, a separation distance between the magnetic sensor <NUM> and the ignition coil <NUM> can be obtained appropriately. This can protect the magnetic sensor <NUM> from the ignition coil <NUM> suitably. That is, the magnetic field sensed by the magnetic sensor <NUM> can be protected from the ignition coil <NUM> suitably. Consequently, the magnetic sensor <NUM> can detect the position of the throttle valve <NUM> accurately.

The supporting portion <NUM> electrically connects the head cover <NUM> to the flanges <NUM>. This effectively reduces radio noise emitted by the ignition device <NUM>. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> suitably. That is, the magnetic field sensed by the magnetic sensor <NUM> can be protected from the radio noise of the ignition device <NUM> suitably. Consequently, the magnetic sensor <NUM> can detect the position of the throttle valve <NUM> more accurately.

Here, it is presumed that the radio noise emitted from the ignition device <NUM> is reduced effectively because a current loop including the ignition device <NUM> becomes small effectively.

<FIG> schematically shows a current loop G1 in the straddled vehicle <NUM> according to the present embodiment. <FIG> shows the current loop G1 with dotted lines.

The current loop G1 is a path where current flows. Current flows from the ignition coil <NUM> through the plug cord <NUM> to the spark plug <NUM>. The current flows from the spark plug <NUM> to the engine <NUM>. Then, the current returns from the engine <NUM> through the supporting portion <NUM> to the ignition coil <NUM>. In such a manner as above, the current loop G1 is a path of the current that flows in the ignition coil <NUM>, the plug cord <NUM>, the spark plug <NUM>, the engine <NUM>, the supporting portion <NUM>, and the ignition coil <NUM> in this order. More specifically, the current loop G1 is a path of the current that flows in the ignition coil <NUM>, the plug cord <NUM>, the spark plug <NUM>, the cylinder head <NUM>, the head cover <NUM>, the supporting portion <NUM>, and the ignition coil <NUM> in this order. The current loop G1 is a closed path. A position of either the cylinder head <NUM> or the head cover <NUM> corresponds to a rear end of the current loop G1.

Here, the current loop G1 does not include the body frame <NUM>. The current loop G1 does not include the main frame <NUM>. That is because the supporting portion <NUM> electrically connects the head cover <NUM> to the flanges <NUM>. In other words, that is because the supporting portion <NUM> electrically connects the engine <NUM> to the ignition coil <NUM>.

Since the current loop G1 does not contain the body frame <NUM>, the current loop G1 becomes small effectively. Specifically, an area surrounded by the current loop G1 becomes small effectively. Accordingly, the radio noise emitted from the ignition device <NUM> is reduced effectively.

Moreover, the throttle device <NUM> is located outward of the current loop G1 in the side view of the vehicle. That is, the throttle device <NUM> is not located inward of the current loop G1 in the side view of the vehicle. The throttle device <NUM> is located more rearward than the current loop G1 in the side view of the vehicle.

The magnetic sensor <NUM> is located outward of the current loop G1 in the side view of the vehicle. That is, the magnetic sensor <NUM> is not located inward of the current loop G1 in the side view of the vehicle. The magnetic sensor <NUM> is located more rearward than the current loop G1 in the side view of the vehicle.

The following exemplifies the configuration of a straddled vehicle and a current loop G2 in the straddled vehicle according to a comparative example for reference.

<FIG> schematically shows a current loop G2 in a straddled vehicle <NUM> according to a comparative example. Components identical to those of the embodiment are shown with the same signs, and will not particularly be described. In the straddled vehicle <NUM> according to the comparative example, the ignition coil <NUM> is supported by the body frame <NUM>. In the straddled vehicle <NUM> according to the comparative example, the ignition coil <NUM> is not supported by the engine <NUM>.

Specifically, the straddled vehicle <NUM> includes a supporting portion <NUM>. The supporting portion <NUM> is supported by the body frame <NUM>. Specifically, the supporting portion <NUM> is supported by the main frame <NUM>. The supporting portion <NUM> supports the ignition coil <NUM>. Accordingly, the ignition coil <NUM> is supported by the main frame <NUM> via the supporting portion <NUM>. The supporting portion <NUM> is not supported by the engine <NUM>. Accordingly, the ignition coil <NUM> is not supported by the engine <NUM>.

In the straddled vehicle <NUM>, current flows from the ignition coil <NUM> through the plug cord <NUM> to the spark plug <NUM>. The current flows from the spark plug <NUM> to the engine <NUM>. Then, the current flows from the engine <NUM> to the body frame <NUM> (specifically, main frame <NUM>). Then, the current returns from the body frame <NUM> through the supporting portion <NUM> to the ignition coil <NUM>. In such a manner as above, the current loop G2 is a path of the current that flows in the ignition coil <NUM>, the plug cord <NUM>, the spark plug <NUM>, the engine <NUM>, the body frame <NUM> (main frame <NUM>), the supporting portion <NUM>, and the ignition coil <NUM> in this order. For example, the current loop G2 is a path of the current that flows in the ignition coil <NUM>, the plug cord <NUM>, the spark plug <NUM>, the cylinder head <NUM>, the cylinder member <NUM>, the crankcase <NUM>, the engine fastening portion <NUM>, the main frame <NUM>, the supporting portion <NUM>, and the ignition coil <NUM> in this order.

Here, the current loop G2 includes the body frame <NUM>. The current loop G2 includes the main frame <NUM>.

Since the current loop G2 contains the body frame <NUM>, the current loop G2 is larger than the current loop G1. Since the current loop G2 contains the main frame <NUM>, the current loop G2 is significantly larger than the current loop G1. Accordingly, the radio noise emitted from the ignition device <NUM> is relatively large in the straddled vehicle <NUM> according to the comparative example. This leads to difficulty in suppression of the radio noise emitted from the ignition device <NUM> in the straddled vehicle <NUM> according to the comparative example.

Moreover, the throttle device <NUM> is located inward of the current loop G2 in the side view of the vehicle. The current loop G2 extends from a position more forward than the throttle device <NUM> to a position more rearward than the throttle device <NUM> in the side view of the vehicle.

The magnetic sensor <NUM> is located inward of the current loop G2 in the side view of the vehicle. The current loop G2 extends from a position more forward than the magnetic sensor <NUM> to a position more rearward than the magnetic sensor <NUM> in the side view of the vehicle.

In summary, first of all, the engine <NUM> is fixed to the body frame <NUM>, the ignition coil <NUM> is supported by the head cover <NUM> of the engine <NUM>, and the spark plug <NUM> is attached to the cylinder head <NUM>. Consequently, in the straddled vehicle <NUM> whose engine <NUM> is fixed to the body frame <NUM>, the difference in vibration between the ignition coil <NUM> and the spark plug <NUM> can be suppressed suitably. Moreover, the ignition coil <NUM> can be protected suitably from the heat of the engine <NUM>. This results in more suitable arrangement of the ignition device <NUM>. Secondly, the throttle device <NUM> is located behind the cylinder head <NUM>, and at least part of the ignition coil <NUM> is located in front of the cylinder axis B in the side view of the straddled vehicle. Accordingly, the magnetic sensor <NUM> can be sufficiently spaced apart from the ignition coil <NUM>. This results in suitable protection of the magnetic sensor <NUM> from the ignition coil <NUM>. Thirdly, the supporting portion <NUM> electrically connects the flanges <NUM> to the head cover <NUM>. This effectively reduces the radio noise radiated by the ignition device <NUM>. This results in suitable protection of the magnetic sensor <NUM> from the radio noise of the ignition device <NUM>.

As described above, with the straddled vehicle <NUM>, the ignition device <NUM> can be installed more appropriately. Specifically, with the straddled vehicle <NUM> according to the present invention, the difference in vibration between the ignition coil <NUM> and the spark plug <NUM> can be suppressed, and the magnetic sensor <NUM> can be protected from the ignition coil <NUM> as well as from the radio noise of the ignition device <NUM>.

The ignition coil <NUM> is entirely located in front of the cylinder axis B in the side view of the vehicle. This can sufficiently obtain the separation distance between the ignition coil <NUM> and the magnetic sensor <NUM>.

The throttle device <NUM> is entirely located behind the cylinder axis B in the side view of the vehicle. This can suitably obtain the separation distance between the ignition coil <NUM> and the magnetic sensor <NUM>.

The magnetic sensor <NUM> is entirely located behind the cylinder axis B in the side view of the vehicle. This can suitably obtain the separation distance between the ignition coil <NUM> and the magnetic sensor <NUM>.

The magnetic sensor <NUM> is located behind the cylinder head <NUM>. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> suitably.

The throttle device <NUM> is located more rearward than the head cover <NUM>. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> suitably.

The magnetic sensor <NUM> is located more rearward than the head cover <NUM>. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> suitably.

At least part of the ignition coil <NUM> is located more rearward than the front end 29b of the head cover <NUM>. Accordingly, the ignition coil <NUM> is located near the head cover <NUM>. Consequently, the head cover <NUM> can support the ignition coil <NUM> suitably.

Moreover, the throttle device <NUM> is located behind the cylinder head <NUM>, at least part of the ignition coil <NUM> is located in front of the cylinder axis B in the side view of the vehicle, and at least part of the ignition coil <NUM> is located more rearward than the front end 29b of the head cover <NUM>. Accordingly, the ignition coil <NUM> is not too close to the magnetic sensor <NUM> and not too far from the spark plug <NUM>. In other words, the current loop G1 is made as small as possible while the separation distance between the ignition coil <NUM> and the magnetic sensor <NUM> is obtained sufficiently. This can protect the magnetic sensor <NUM> from the ignition coil <NUM> while protecting the magnetic sensor <NUM> from the radio noise of the ignition device <NUM>. This results in achievement in a high level both the protection of the magnetic sensor <NUM> from the ignition coil <NUM> and the protection of the magnetic sensor <NUM> from the radio noise of the ignition device <NUM>. In other words, the arrangement of the ignition coil <NUM> can be optimized.

The ignition coil <NUM> is entirely located more rearward than the front end 29b of the head cover <NUM>. Accordingly, the head cover <NUM> can support the ignition coil <NUM> more suitably. Moreover, it is possible to achieve both the protection of the magnetic sensor <NUM> from the ignition coil <NUM> and the protection of the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> in a much higher level.

At least part of the ignition coil <NUM> is located above the head cover <NUM>. At least part of the ignition coil <NUM> overlaps the head cover <NUM> in the plan view of the vehicle. Accordingly, the head cover <NUM> can support the ignition coil <NUM> more suitably.

At least part of the ignition coil <NUM> is located higher than the throttle device <NUM>. Accordingly, the magnetic sensor <NUM> can be easily spaced apart from the ignition coil <NUM>.

At least part of the ignition coil <NUM> is located higher than the magnetic sensor <NUM>. Accordingly, the magnetic sensor <NUM> can be easily spaced apart from the ignition coil <NUM>.

At least part of the ignition coil <NUM> is located higher than the upper end 29a of the head cover <NUM>. At least part of the throttle device <NUM> is located lower than the upper end 29a of the head cover <NUM>. This can protect the ignition coil <NUM> from the heat of the engine <NUM> suitably. Moreover, this can easily obtain the separation distance between the ignition coil <NUM> and the magnetic sensor <NUM>.

At least part of the ignition coil <NUM> is located higher than the upper end 29a of the head cover <NUM>. At least part of the magnetic sensor <NUM> is located lower than the upper end 29a of the head cover <NUM>. This can protect the ignition coil <NUM> from the heat of the engine <NUM> suitably. Moreover, this can easily obtain the separation distance between the ignition coil <NUM> and the magnetic sensor <NUM>.

The ignition coil <NUM> is entirely located more forward than the spark plug <NUM>. Accordingly, the current loop G1 is formed more forward than the spark plug <NUM>. The current loop G1 extends forward from the spark plug <NUM>. The throttle device <NUM> is entirely located more rearward than the spark plug <NUM>. Accordingly, the throttle device <NUM> is located more rearward than the current loop G1. The throttle device <NUM> is entirely located more rearward than the current loop G1. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> suitably.

The ignition coil <NUM> is entirely located more forward than the spark plug <NUM>. The magnetic sensor <NUM> is entirely located more rearward than the spark plug <NUM>. Accordingly, the magnetic sensor <NUM> is located more rearward than the current loop G1. The magnetic sensor <NUM> is entirely located more rearward than the current loop G1. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> suitably.

The throttle device <NUM> is entirely located more rearward than the ignition device <NUM>. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> suitably.

The magnetic sensor <NUM> is entirely located more rearward than the ignition device <NUM>. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> suitably.

The ignition coil <NUM> is entirely located higher than the spark plug <NUM>. At least part of the throttle device <NUM> is located higher than the spark plug <NUM>. This can arrange the ignition coil <NUM>, the spark plug <NUM>, and the throttle device <NUM> at appropriate positions.

The spark plug <NUM> overlaps the cylinder axis B in the side view of the vehicle. Accordingly, the spark plug <NUM> can be positioned near the ignition coil <NUM>. This further reduces the size of the current loop G1. Accordingly, the radio noise from the ignition device <NUM> is further reduced.

The spark plug <NUM> is entirely located in front of the extension E of the rear edge 24a of the cylinder bore <NUM> in the side view of the vehicle. This can easily reduce the size of the current loop G1. Accordingly, the radio noise of the ignition device <NUM> can be reduced suitably. This results in more suitable protection of the magnetic sensor <NUM> from the radio noise of the ignition device <NUM>.

The ignition coil <NUM> is entirely located in front of the extension E in the side view of the vehicle. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> more suitably. The magnetic sensor <NUM> can be protected from the ignition coil <NUM> more suitably.

The throttle device <NUM> is entirely located behind the extension E in the side view of the vehicle. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> more suitably.

The magnetic sensor <NUM> is entirely located behind the extension E in the side view of the vehicle. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> more suitably.

The ignition coil <NUM> is entirely located in the left area AL in the plan view of the vehicle, and the spark plug <NUM> is entirely located in the right area AR in the plan view of the vehicle. This can bend the plug cord <NUM> relatively gently. For example, the plug cord <NUM> can be bent at a relatively low curvature. For example, the plug cord <NUM> can be bent at a relatively large radius of curvature. Accordingly, the plug cord <NUM> can be laid easily.

The supporting portion <NUM> extends upward and forward from the head cover <NUM>. Consequently, the supporting portion <NUM> can support the ignition coil <NUM> suitably.

At least part of the supporting portion <NUM> overlaps the head cover <NUM> in the plan view of the vehicle. Thus, the head cover <NUM> can support the supporting portion <NUM> suitably. The supporting portion <NUM> can support the ignition coil <NUM> suitably.

The supporting portion <NUM> contacts the head cover <NUM>. Thus, the supporting portion <NUM> can electrically connect the head cover <NUM> (engine <NUM>) to the ignition coil <NUM> suitably.

The supporting portion <NUM> contacts the flanges <NUM>. Thus, the supporting portion <NUM> can electrically connect the head cover <NUM> (engine <NUM>) to the ignition coil <NUM> suitably.

The supporting portion <NUM> includes the bosses <NUM> and the fastening portions <NUM>. The bosses <NUM> are connected to the head cover <NUM>. The fastening portions <NUM> fasten the flanges <NUM> to the bosses <NUM> individually. The bosses <NUM> electrically connect the head cover <NUM> to the flanges <NUM>. Thus, the supporting portion <NUM> can electrically connect the engine <NUM> to the ignition coil <NUM> suitably while supporting the ignition coil <NUM> suitably.

The cylinder axis B extends upward and forward at an angle of <NUM> degrees or more with respect to the horizontal line H in the side view of the vehicle. As described above, the cylinder axis B is closer to a vertical line than the horizontal line H. The vertical line is an imaginary line parallel to the up-down direction Z. Consequently, the present embodiment is suitably applicable to the engine <NUM> having the cylinder axis B that is closer to the vertical line than the horizontal line H.

The body frame <NUM> includes the main frame <NUM> connected to the engine <NUM>. At least part of the main frame <NUM> is located above the engine <NUM> and the ignition device <NUM> in the side view of the vehicle. As described above, the current loop G1 does not contain the body frame <NUM>. Accordingly, the current loop G1 can be reduced in size suitably even when at least part of the main frame <NUM> is located above the engine <NUM> and the ignition device <NUM> in the side view of the vehicle. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> suitably.

The ignition coil <NUM> is entirely located more forward than the throttle device <NUM> in the side view of the vehicle. The throttle device <NUM> is entirely located behind the cylinder head <NUM>. The main frame <NUM> extends from a position higher and more forward than the throttle device <NUM> to a position more rearward and lower than the throttle device <NUM> in the side view of the vehicle. The engine fastening portion <NUM> is located more rearward and lower than the throttle device <NUM> in the side view of the vehicle. In other words, at least one of the fastening points between the main frame <NUM> and the engine <NUM> is located more rearward and lower than the throttle device <NUM> in the side view of the vehicle. Accordingly, the current loop G1 can be reduced in size suitably even when the ignition coil <NUM>, the engine <NUM>, and the main frame <NUM> are arranged so as to surround the throttle device <NUM> in the side view of the vehicle. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> suitably.

The main frame <NUM> includes the right main frame 5R and the left main frame <NUM>. The right main frame 5R passes a position rightward of the throttle device <NUM>, and extends from a position more forward than the throttle device <NUM> to a position more rearward than the throttle device <NUM> in the plan view of the vehicle. The left main frame <NUM> passes a position leftward of the throttle device <NUM>, and extends from a position more forward than the throttle device <NUM> to a position more rearward than the throttle device <NUM> in the plan view of the vehicle. Accordingly, the current loop G1 can be reduced in size suitably even when the right main frame 5R and the left main frame <NUM> are arranged so as to surround the throttle device <NUM> in the plan view of the vehicle. This can protect the magnetic sensor <NUM> from the radio noise of the ignition device <NUM> suitably.

The throttle device <NUM> includes the throttle body <NUM> configured to accommodate the throttle valve <NUM>. The throttle body <NUM> contacts the cylinder head <NUM>. Accordingly, the throttle body <NUM> is positioned near the cylinder head <NUM> (engine <NUM>). This can enhance performance of the engine <NUM> suitably.

Claim 1:
A straddled vehicle (<NUM>), comprising:
a body frame (<NUM>);
an engine (<NUM>);
a throttle device (<NUM>) configured to control an intake air amount of the engine (<NUM>);
an ignition device (<NUM>) including a spark plug (<NUM>), a plug cord (<NUM>) connected to the spark plug (<NUM>), and an ignition coil (<NUM>) connected to the plug cord (<NUM>); and
a supporting portion (<NUM>),
the engine (<NUM>) including:
a cylinder member (<NUM>) having a cylinder bore (<NUM>) centering on a cylinder axis (B);
a cylinder head (<NUM>); and
a head cover (<NUM>),
the throttle device (<NUM>) including:
a throttle valve (<NUM>); and
the spark plug (<NUM>) being attached to the cylinder head (<NUM>),
the ignition coil (<NUM>) including:
a casing (<NUM>);
a secondary terminal (<NUM>) attached to the casing (<NUM>) and connected to the plug cord (<NUM>); and
a flange (<NUM>) attached to the casing (<NUM>) and connected to the supporting portion (<NUM>);
at least part of the ignition coil (<NUM>) being located in front of the cylinder axis (B) in side view of the straddled vehicle (<NUM>),
characterized in that said engine (<NUM>) is fixed to said body frame (<NUM>); said supporting portion (<NUM>) being configured to support the ignition coil (<NUM>) and supported by the head cover (<NUM>); said head cover (<NUM>) being provided above said cylinder head (<NUM>);
said cylinder head (<NUM>) being provided above the cylinder member (<NUM>);
said throttle device (<NUM>) being located behind the cylinder head (<NUM>);
said supporting portion (<NUM>) electrically connecting said head cover (<NUM>) to said flange (<NUM>);
said straddle vehicle (<NUM>) further comprising a magnetic sensor (<NUM>) configured to detect a position of the throttle valve (<NUM>).