44MM QMB139 Big Bore engine Kit w/ Head(64mm-Non Emission)

Upgrade Your Ride with the 44mm QMB139 Big Bore Engine Kit

Boost the performance of your scooter or ATV with this comprehensive 44mm QMB139 Big Bore engine kit, featuring a high-flow 64mm non-emission cylinder head. Designed for significant power gains, this kit transforms your engine's capabilities.

• 44mm Bore Diameter delivers increased displacement for greater power output.
• 64mm Valve Size ensures efficient airflow for enhanced combustion and performance.
• Non-Emission (Non-EGR) Cylinder Head provides a cleaner, more direct combustion path for optimal efficiency.
• Compatible with QMB139 Engines, offering a direct upgrade path for many 50cc applications.
• Included Piston and Cylinder Components provide the core elements for a substantial engine enlargement.

Compared to standard 50cc engines, this 44mm big bore kit offers a noticeable increase in torque and horsepower, allowing for quicker acceleration and higher top speeds. The non-emission head design focuses purely on performance, eliminating restrictions often found in emissions-compliant components without sacrificing reliability.

Key Technical Advantages: Technology and Performance

This kit leverages precision engineering to maximize engine output. The larger 44mm bore combined with the efficient 64mm valve cylinder head works synergistically to improve volumetric efficiency. This means more air and fuel enter the combustion chamber, and exhaust gases are expelled more rapidly, leading to a significant boost in overall engine performance. The non-emission design further refines this by removing flow restrictions, ensuring that the engine breathes freely for maximum power delivery.