Universal Parts GY6 63mm Big Bore Cylinder Kit

Universal Parts 63mm Big Bore Cylinder Kit for 150cc GY6 4-stroke engines. Upgrades to 180cc based on a stock stroke of 57.8mm! Includes cylinder, piston, pin, circlips, rings, head gasket and base gasket. *You may need to modify your engine case to accommodate the larger cylinder.
Upgrades to 180cc!
Bore: 63mm
Overall Height: 90.5mm Cylinder Sleeve Outer Diameter: 64.9mm
SUPPORTED MODELS: GY6 QMI/QMJ 152/157, Various unlisted makes/models