US Patent 7398760 Intake air control apparatus for motor cycle

In order to protect a rotating portion of an intermediate link lever support pin, an intake air control apparatus provided with main and sub throttle valves is structured such that a wire bracket (6) supporting valve opening and closing wires (Wa, Wb) is screwed to an outer end surface (1a) at a throttle drum side of a throttle body (1), an intermediate link lever support pin (23) is provided toward the throttle body (1) side on an inner end surface (6d) facing to the throttle body (1) of the wire bracket (6), an intermediate link lever (20) rotatably borne to the intermediate link lever support pin (23) is arranged at the throttle body (1) side from the inner end surface (6d), and a rotating portion (R) of the intermediate link lever support pin (23) and the intermediate link lever (20) is arranged to face to the inner end surface (6d).