The Story
50mm Big Bore Cylinder Kit for 50cc 4-stroke QMB139 engines. Upgrades to 81.3cc based on a stock stroke of 41.4mm! Includes cylinder, piston, pin, circlips, rings, head gasket and base gasket.
*You may need to modify your engine case to accommodate the larger cylinder.
- Upgrades to 81.3cc!
- Bore: 50mm
- Overall Height: 70mm
- Cylinder Sleeve Outer Diameter: 54.4mm
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
50mm Big Bore Cylinder Kit for 50cc 4-stroke QMB139 engines. Upgrades to 81.3cc based on a stock stroke of 41.4mm! Includes cylinder, piston, pin, circlips, rings, head gasket and base gasket.
*You may need to modify your engine case to accommodate the larger cylinder.
- Upgrades to 81.3cc!
- Bore: 50mm
- Overall Height: 70mm
- Cylinder Sleeve Outer Diameter: 54.4mm
