GY6 100CC 50MM QMB139 Big Bore engine Kit w/ Head(69mm-EGR PAIR)
GY6 100CC 50MM QMB139 Big Bore Engine Kit with 69mm EGR PAIR Head
Upgrade your scooter's performance with this comprehensive GY6 100CC 50MM QMB139 Big Bore Engine Kit, designed to significantly boost power and efficiency. This kit features a precisely engineered 50mm bore cylinder and a high-performance cylinder head with 69mm valves, ready to transform your QMB139 engine.
- 50mm Piston Diameter: Delivers a 100cc displacement for substantially increased power output compared to stock 50cc engines.
- 69mm Valve Cylinder Head: Equipped with 69mm intake and exhaust valves and a 17mm intake port diameter, allowing for superior airflow and combustion.
- 50mm Bore Cylinder Body: Precisely machined for optimal fitment and thermal management, ensuring durability under increased load.
- EGR (Exhaust Gas Recirculation) PAIR Style Head: Features specific porting designed for compatibility with EGR systems, maintaining emission compliance while enhancing performance.
- Complete Variator Kit Included: Comes with a variator featuring a 62-tooth drive face and 8.5g roller weights, optimizing power delivery across the RPM range.
This engine kit represents a significant leap forward from standard 50cc QMB139 engines, offering a noticeable increase in torque and top speed. Unlike previous generations or basic upgrade kits, this package integrates larger bore components with a carefully matched cylinder head and variator system, ensuring a more complete and effective performance enhancement for riders seeking a true power upgrade.
Key Technical Advantages: Advanced Technology and Proven Performance
Experience enhanced power and reliability with advanced engineering. This kit leverages precise machining and quality components to deliver a robust performance upgrade, transforming your riding experience with increased acceleration and sustained power.