Patent ID: 7958867

Claim:
An accelerator position sensor arrangement structure for a motorcycle, comprising: an accelerator position sensor adapted to detect operation of a throttle grip; and a control motor adapted to drive a throttle valve which controls an amount of intake air for an engine supported by a body frame, wherein the body frame includes a pair of right and left main frames which extend toward a rear of a vehicle body from a head pipe; a pair of left and right down tubes which extend from the head pipe downwardly of the vehicle body and support an engine; and a connection member on at least one side of the motorcycle which connects a rear portion of the corresponding main frame with a lower portion of the corresponding down tube; and wherein an opening for accommodating the accelerator position sensor is provided which is surrounded by the main frame, the down tube, and the connection member on the at least one side of the motorcycle so as to open to a side of the vehicle body, and a throttle drum of the accelerator position sensor is connected to the throttle grip via a pair of throttle cables, wherein the throttle grip is provided on a right side of a handlebar, the throttle cables extend downwardly and forwardly from the throttle grip, around a forward side of the head pipe, and rearwardly along an external lateral surface of the left main frame, to the throttle drum of the accelerator position sensor on an outer side of the opening, wherein the throttle drum is surrounded in a radial direction thereof by the main frame, the down tube, and the connection member, thereby avoiding a need to increase a distance between the left and right main frames, and further comprising: a transverse-mounted radiator disposed on an outside of the main frames and disposed at a position overlapping the accelerator position sensor, so that when the motorcycle is viewed in side view, the accelerator position sensor is inconspicuously arranged in terms of external appearance and cannot be seen, wherein the radiator includes a radiator cover disposed inwardly of the radiator with respect to the vehicle body, and the radiator cover is formed with a concave portion concave which ensures that the radiator cover does not interfere with a portion of the throttle cables extending along the external lateral surface of the left main frame to the accelerator position sensor.