ProX offers a complete line of piston pin bearings for the Dirt bike, ATV, PWC and 50cc/scooter segment. The pistons pin bearings are manufactured by the leading Japanese OEM factories.All pistons pin bearings are designed and developed to OEM specifications and are a direct and cost efficient OEM replacement.Full line of piston pin bearings for Dirt bike, ATV, PWC and 50cc/scooter available from ready stock.