47mm QMB139 Complete Non-Emissions Cylinder Head
50cc QMB139 4-stroke 47mm, Non-Emissions Cylinder Head with 64mm Valves for use with 72cc Big Bore Kit!
- For Use with 72cc Big Bore Kit
- Valve Length: 64mm
- Overall Height: 59.5mm
- Intake Port Diameter: 17mm
- Exhaust Port Diameter: 18mm
- Intake Bolt Hole Spacing: 44.5mm
- Exhaust Bolt Hole Spacing: 50mm