150cc GY6 Piston Set, Part #164-94

57mm Piston Pin and Circlips for the 150cc 4-stroke QMJ QMI/152 GY6 engine and 150cc GY6 4-stroke ZNEN engines commonly found in Bintelli Gorilla Motor Works (GMW) and Puma scooters. Piston Diameter: 57mm. Piston Pin Diameter 15mm. Includes: piston piston pin and 2 cir clips. Compression Height (center of piston pin hole to top of piston): 20mm.