Big Bore Head - Universal Parts 50mm QMB139 Complete Non Emissions Cylinder Head 64mm Valves > Part#151GRS265
Grand Rapids Scooter Engine Parts
50cc QMB139 4-stroke 50mm, Non Emissions Cylinder Head with 64mm Valves for use with 81.3cc Big Bore Kit!
- For Use With 81.3cc Big Bore Kit
- Valve Length: 64mm
- Overall Height: 59.5mm
- Intake Port Diameter: 18mm
- Exhaust Port Diameter: 17mm
- Intake Bolt Hole Spacing: 44.5mm
- Exhaust Bolt Hole Spacing: 50mm
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