Cylinder Kit - Hoca 50mm QMB139 Performance Cylinder Kit Upgrades to 83cc! > Part #169GRS54
Grand Rapids Scooter 50cc QMB139 4-stroke 50mm, Racing Big Bore Cylinder Set. Kit includes cylinder, piston, rings, piston pin, cir clips, head gasket, and base gasket.
Fits most 4 stroke models for these Brands: Bintelli, Tao Tao, Peace Sports, Wolf, Schwinn, Puma, SYM, Alliance, Motorino, Kymco
We recommend that you use our QMB139 performance cylinder head (see Related Items) with this set as some stock cylinder heads will not fit.
- Upgrades to 80cc
- Cylinder Bore: 50mm
- Cylinder Sleeve Outer Diameter: 54.9mm
- Wrist Pin Diameter: 13mm
- Total Piston Height: 34.8mm
- Compression Height (from center of wrist pin hole to top edge of piston): 18.3mm
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