Motorcycle One Way Starter Clutch Bearing For GPZ500 500R KLE500 5 ER500 500 EN500 EX500A EX500D This one way starter clutch bearing is designed for use with specific motorcycle models including GPZ500, 500R, KLE500, ER500, EN500, and EX500 series.It functions as a critical component in the starter system, allowing rotational in while preventing it in the opposite.The bearing fits into the starter mechanism to engage and disengage the starter drive properly during engine start-up.It is built to match specifications for and under normal riding conditions.Installation requires standard mechanical tools and knowledge of motorcycle engine components.