Manufactured by SPI Includes piston, ring set, wrist pin, circlips as pictured SPI pistons are engineered to provide the best possible path for combustion chamber heat transfer to the cylinder walls All SPI pistons, rings, pins, circlips are manufactured to OEM specifications All individual components are interchangeable with original parts Piston weight is compatible with original piston T-Moly series with Teflon-Molybdenum coating T-Moly series pistons reduce friction, resist seizure, improve durability Made in Taiwan Piston is for standard bore size 67.75mm Fits 1988 Polaris 650 1988 Polaris 650 SKS 1989 Polaris 650 1989 Polaris 650 SKS 1990 Polaris 650 1990 Polaris 650 RXL 1990 Polaris 650 SKS 1991 Polaris 650 1991 Polaris 650 RXL 1991 Polaris 650 RXL SKS 1992 Polaris 650 1992 Polaris 650 RXL 1992 Polaris 650 RXL SKS 1993 Polaris 650 RXL 1993 Polaris 650 RXL SKS 1994 Polaris 650 RXL 1994 Polaris 650 RXL Touring 1995 Polaris 650 RXL 1995 Polaris 650 RXL LT 1995 Polaris 650 RXL Touring 1996 Polaris 650 RXL 1997 Polaris 650 RXL