Universal Parts 50cc QMB139 4-stroke 47mm, Performance Cylinder Kit. Upgrades to 72cc! Kit includes cylinder, piston, rings, piston pin, cir clips, head gasket, and base gasket.Please see our Warranty & Returns Policy.*You may need to modify your engine case to accommodate the larger cylinder. Upgrades to 72cc Cylinder Bore: 47mm Cylinder Sleeve Outer Diameter: 52.7mm Wrist Pin Diameter: 13mm Total Piston Height: 34.4mm Compression Height (from center of wrist pin hole to top edge of piston): 17.25mm
50cc QMB139 4-stroke 47mm, Performance Cylinder Kit. Upgrades to 72cc! Kit includes cylinder, piston, rings, piston pin, cir clips, head gasket, and base gasket.Please see our Warranty & Returns Policy.*You may need to modify your engine case to accommodate the larger cylinder. Upgrades to 72cc Cylinder Bore: 47mm Cylinder Sleeve Outer Diameter: 52.7mm Wrist Pin Diameter: 13mm Total Piston Height: 34.4mm Compression Height (from center of wrist pin hole to top edge of piston): 17.25mm
