US Patent 10501140 Two-wheeled vehicle

A two-wheeled vehicle includes a frame, a plurality of ground-engaging members for supporting the frame, and an engine supported by the frame and operably coupled to the ground-engaging members. Additionally, the frame includes a main frame portion having an air inlet at a front side thereof, an air duct extending through the main frame portion, and at least one air outlet at a rear side thereof, whereby the air outlets exhaust air from the air duct to cool the rider.