GY6 GY7 TANK200 CHUMA CARBON ARMOR  63 MM OVERSIZE PISTON KIT. MAKES THE 161CC SCOOTER A 180 CC SCOOTER. EXCELLENT QUALITY KIT AND RACE PROVEN. INCLUDES PISTON, RINGS, CLIPS, PISTON PIN AND NECESSARY GASKETS. 57 MM SPACING. TAIWAN QUALITY

INCLUDES NECESSARY GASKET FOR THE REMOVAL AND INSTALLATION