Hoca 50cc QMB139 4-stroke 50mm, Racing Big Bore Cylinder Set. Kit includes cylinder, piston, rings, piston pin, cir clips, head gasket, and base gasket.
Hoca Performance Cylinder Kit Specifications:
Upgrades to 80cc
Cylinder Bore: 50mm
Cylinder Sleeve Outer Diameter: 54.8mm
Wrist Pin Diameter: 13mm
Total Piston Height: 34.8mm
Compression Height (from center of wrist pin hole to top edge of piston): 18.3mm
Hoca 50cc QMB139 4-stroke 50mm, Racing Big Bore Cylinder Set. Kit includes cylinder, piston, rings, piston pin, cir clips, head gasket, and base gasket.
Hoca Performance Cylinder Kit Specifications:
Upgrades to 80cc
Cylinder Bore: 50mm
Cylinder Sleeve Outer Diameter: 54.8mm
Wrist Pin Diameter: 13mm
Total Piston Height: 34.8mm
Compression Height (from center of wrist pin hole to top edge of piston): 18.3mm