USED ON THESE S90'S from serial: S90-111565 to serial: 142498 AND AGAIN from serial: S90-424487 to serial: 527510 328H @ * PIN ROLLER ALUMINUM 90CC S90 CYLINDER 14615-028-000 1/22M (329V)THIS IS THE BOLT FOR THE ROLLER ON THE RARE ALUMINUM 90CC CYLINDERS SOME STEEL AS WELL FROM EARLY S90'S LARGE PIN USED ON THESE S90'S from serial: S90-111565 to serial: 142498 AND AGAIN from serial: S90-424487 to serial: 527510 329V