Manufactured by SPI OEM style piston kits Includes 2 pistons, ring sets, wrist pins, circlips Engineered to provide the best possible path for combustion chamber heat transfer to the cylinder walls All pistons, rings pins, and circlips are manufactured to OEM specifications All individual components are interchangeable with original parts Piston weight compatible with original piston Pistons are for .020 over bore size 68.50mm Made in Taiwan Fits 1975 Yamaha GP433 1975 Yamaha TL433 1976 Yamaha Exciter 440 EX440 1976 Yamaha GP440 1976 Yamaha Prestige 440 PR440 1977 Yamaha Exciter 440 EX440 1977 Yamaha GP440 1978 Yamaha Exciter 440 EX440 1979 Yamaha Exciter 440 EX440 1980 Yamaha Exciter 440 EX440 1981 Yamaha Exciter 440 EX440