Naraku 50cc QMB139 4-stroke 52.4mm, Racing Big Bore Cylinder and Head Kit. Kit includes cylinder, piston, rings, piston pin, cir clips, cylinder head, head gasket, and base gasket.When used in conjunction with a stock stroke of 41.4mm the total displacement comes out to 89.3cc! Please see our Warranty & Returns Policy.*You may need to modify your engine case to accommodate the larger cylinder.
Weight
72 oz
Dimensions
6 × 6 × 8 in
Upgrades to 89.3cc
Cylinder Bore: 52.4mm
Cylinder Sleeve Outer Diameter: 54.4mm
Wrist Pin Diameter: 13mm
Total Piston Height: 36.3mm
Compression Height (from center of wrist pin hole to top edge of piston): 20mm
