Patent ID: 8157041

Claim:
An intake device for a motorcycle, wherein a four-stroke engine equipped with an electronic fuel injection system is mounted in a front half portion of a vehicle body frame and is provided with a cylinder assembly standing substantially vertically, a rear cushion unit including a damper chamber, a piston rod and a coil spring is arranged behind the engine in a substantially vertical posture, an air cleaner is arranged in a rear portion of the rear cushion unit and below a rider's seat, an air intake port opened to a rear portion of a cylinder head of the cylinder assembly and the air cleaner are connected to each other through an air intake passage, in which the air intake passage includes an intake pipe, a throttle body and a connecting pipe connected in the described order as viewed from a side portion of the engine to a side portion of the air cleaner, an overlapping portion of the connecting pipe which is overlapped with an upper portion of the rear cushion unit extends above an upper end of the coil spring in a side view of the motorcycle, an axis of a downstream end opening of the connecting pipe extends above a center of an upstream end opening of the connecting pipe, the connecting pipe is provided with both an upper enlarged portion that extends upward from a main portion of the air intake passage and a lower enlarged portion that extends from the main portion of the air intake passage, as viewed from a side view, at least a part of the lower enlarged portion overlaps an upper portion of the coil spring, and the lower enlarged portion extends in a vehicle width direction to a smaller extent than the main portion of the air intake passage and the upper enlarged portion.