Motorcycle one-way clutch, also known as a sprag clutch or a freewheel, is a specific type of clutch mechanism used in motorcycles. It is designed to transmit power in one direction while allowing free rotation in the opposite direction.

   The one-way clutch is typically located in the transmission system of the motorcycle. It consists of a set of sprags or rollers that engage and disengage with an inner and outer race. When the sprags are engaged, they transmit torque from the input side to the output side of the clutch, allowing the motorcycle to move forward. However, when the rotation direction is reversed, the sprags disengage, allowing the output side to rotate freely without transmitting power back to the input side.