- For Use with 72cc Big Bore Kit
- Valve Length: 69mm
- Overall Height: 59.5mm
- Intake Port Diameter: 17mm
- Exhaust Port Diameter: 18mm
- Intake Bolt Hole Spacing: 44.5mm
- Exhaust Bolt Hole Spacing: 50mm
Universal Parts 50cc QMB139 4-stroke 47mm, Non Emissions Cylinder Head with 69mm Valves for use with 72cc Big Bore Kit!
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74 in stock