Motorcycle Starter Clutch Gear Assy Kit for BJ250GY-2 BJ250GY2 BJ250 Overrunning One Way Starter Bearing.This assembly kit includes the starter clutch gear and overrunning one way bearing designed to fit BJ250GY-2 models.It is engineered to transmit power from the starter motor to the engine crankshaft during startup.The one way bearing allows rotational in a single direction, proper engagement and disengagement of the starter mechanism.This component plays a critical role in the of the motorcycle starting system.