Hoca 50cc QMB139 4-stroke 52mm, performance cylinder head.
Please note: replaces Cylinder Heads with 64mm Valves (Short Valve Style).
- Intake Valve Diameter: 21.5mm
- Intake Port Diameter: 24mm
- Exhaust Valve Diameter: 18.9mm
- Exhaust Port Diameter: 22mm
Valve Length: 62.3mm (compatible with 64mm Short Valve Style Heads)
- Does Not Include Camshaft, Please See Related Items