Universal Parts GY6 Cylinder and Head Kit

Universal Parts Cylinder and Head Kit for 150cc GY6 4-stroke engines. Includes cylinder, piston, pin, circlips, rings, head gasket, base gasket and chain tensioner gasket. Please choose from 57.4mm bore or 61mm bore from the drop down menu.*You may need to modify your engine case to accommodate the larger cylinder. Bore: 57.4mm or 61mm, choose in the drop down menu.Overall Height: 90mm Cylinder Sleeve Outer Diameter: 61mm (57.4mm cylinder kit) or 65mm (61mm cylinder kit.)Uses 6mm Exhaust Studs