TWO-WHEELED MOTOR VEHICLE AND POWER UNIT

摘要

A two-wheeled motor vehicle has an internal combustion engine having a crankshaft, a speed changing mechanism, a centrifugal starter clutch, and a torque converter. The centrifugal starter clutch and the torque converter are arranged between the crankshaft and the speed changing mechanism. Between the crankshaft and the torque converter is disposed a one-way clutch. The one-way clutch transmits power from the speed changing mechanism to the crankshaft only when a drive force transmitted from wheels to the speed changing mechanism side is greater than a drive force of the engine, and at the same time, when the rotating speed of the crankshaft is equal to or greater than a predetermined value.