Honda Motor Co., Ltd.
Exhaust control valve of saddle-riding vehicle

Abstract:

An engine exhaust control valve of a saddle-riding vehicle is provided with: a valve shaft disposed in an intersecting manner with a center line of a main pipe portion of an engine exhaust pipe; a valve plate mounted on the valve shaft and rotatably positioned within an inner peripheral surface of the main pipe portion; a valve rotational drive portion mounted on one shaft end of the valve shaft; a drive motor for driving the valve rotational drive portion; and a control unit for controlling the drive motor. Protruding portions with which outer peripheral edges of the valve plate are brought into contact at a rotational limit of the valve plate in a closing direction are formed on an inner peripheral surface of the main pipe portion. The above structure provides a high degree of sealing.