Applicability: Designed for BT49QT models, compatible with 50cc four-stroke 139QMB engines, suitable for a variety of small motorcycles and .
: Made of solid alloy to ensure stable performance during engine .
Design: The camshaft bracket and rocker arm assembly are optimized to effectively improve the engine's distribution efficiency, bringing smoother power output and driving experience.
Installation: The structural design is simple, the installation process is convenient, and no complex tools are required, which is suitable for users to operate and replace by themselves.
Durability: After rigorous performance testing, it can maintain stable performance under various riding conditions and extend the service life of the engine.