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.
Naraku 52.4mm Performance Cylinder & Head Kit
$259.99
Naraku 52.4mm Performance Cylinder & Head Kit
Out of stock
| 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
- Non-emissions style head
- Intake valve: 23mm
- Exhaust valve: 20mm
- Intake Port Diameter: 20.8mm
- Exhaust Port Diameter: 18.7mm
- Uses Short 64mm Valve Stems
