- 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
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.
38 in stock