GY6 SCOOTER 4 VALVE 58.5MM BIG BORE 155CC PERFORMANCE CYLINDER KIT RACING Hi CO

GY6 125 & 150CC  58.5 OVERSIZE PISTON KIT 4 VALVE  MAKES THE 150CC SCOOTER A 155CC SCOOTER. GREAT QUALITY KIT AND RACE PROVEN.INCLUDES PISTON, RINGS, CLIPS, PISTON PIN AND NECESSARY GASKETS.

NOTE: TO USE THIS KIT YOU SHOULD ALREADY HAD THE 4 VALVE HEAD AND CAM. WILL NOT FIT A REGULAR HEAD AND CAM