39mm QMB139 Engine Kit with 64mm EGR Head

Upgrade your QMB139 50cc engine with this comprehensive 39mm big bore kit, featuring a high-performance cylinder head equipped with 64mm intake and exhaust valves. Designed for enhanced power and reliability, this kit provides the essential components to significantly boost your scooter's performance.

• 39mm Bore Diameter: Increases engine displacement for greater power output.
• 64mm Valve Size: Allows for improved air-fuel mixture intake and exhaust gas expulsion.
• EGR Style Cylinder Head: Engineered for efficient operation and emissions control.
• Included Rocker Arms & Retainer: Ensures proper valve train function with the new head.
• Piston Kit Included: Features a 39mm piston with a 13mm pin diameter for a precise fit.

Compared to stock 39mm bore engines, this kit offers a substantial performance gain by optimizing cylinder volume and valve flow. It's engineered to integrate seamlessly with your QMB139 50cc engine, providing a noticeable increase in acceleration and top speed without compromising engine integrity.

Key Technical Advantages: Technology and Performance

This engine kit leverages precision engineering to deliver superior performance. The 39mm bore cylinder, paired with the 64mm valve head, maximizes combustion efficiency. The EGR-compatible design ensures compliance while maintaining robust power delivery. This kit is ideal for enthusiasts seeking a reliable upgrade for their 50cc QMB139 powered vehicles.