ProX offers a complete line of piston pin bearings for the Dirtbike, 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 Dirtbike, ATV, PWC and 50cc/scooter available from ready stock.