Description
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
SUPPORTED MODELS: QMB139 50cc/49cc