Hoca 4T Racing Kit for 50cc 4-stroke QMB139 Scooters and Engines. This kit includes everything you need to increase overall speed, horsepower and torque.
Includes High Performance: - CVK 26mm HP Carburetor
- Performance Transmission Kit (see Related Items for further Transmission Kit details)
- Power Intake
- High-Angle Camshaft
- 1500 RPM Torque Yellow Drive Spring
- Big Bore Kit (50mm)
- Complete Performance Cylinder Head
- Overall Height (cylinder): 71mm
- Valve Overall Length: 62.3mm (compatible with 64mm Short Valve Style Heads)