Universal Parts 57mm Piston, Pin, and Circlips for the 150cc 4-stroke QMJ QMI/152 GY6 engines.

• Piston Diameter: 57.4mm
• Piston Pin Diameter: 15mm
• Includes: piston, piston pin, and 2 cir clips
• Compression Height (center of piston pin hole to top of piston): 20mm