Spi SM-109287 Hyperdryve Piston Kit - Standard Bore - 85.00mm tires-wheels-rims 1971-1972 Harley Davidson XLCH

1971-1972 Harley Davidson XLCH

1996-1997 KTM 620 EGS

1987-1994 Yamaha YFM350ER Moto-4

2010-2011 Big Dog Bulldog

This 3" system connects directly to the factory connection point for a simple install

Spi SM-109287 Hyperdryve Piston Kit - Standard Bore - 85.00mm tires-wheels-rims 1971-1972 Harley Davidson XLCHBore: 85. 00mm Sizing: Sizing Not Available The next step in the evolution of high performance powersports pistons. Space age aluminum alloy maintains high tensile strength up to 700 F. Temperature resistance is 50% higher than conventional cast pistons. Temperature resistance improves fatigue strength and impact durability. Hyperdryve keeps you riding longer and harder than competitors pistons. Vehicle Fitment: 2017 2018 Polaris 800 PRO RMK 155 2017