47mm QMB139 Cylinder Kit
Kit includes cylinder, piston, rings, piston pin, cir clips, head gasket, and base gasket.
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*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