Restore or upgrade your scooter's transmission with this complete variator kit for QMB139 50cc 4-stroke engines. Designed for optimal CVT performance, this variator set includes everything needed for a smooth, responsive ride—ideal for replacing worn OEM components or tuning your transmission system.
Compatible with most Chinese 50cc scooters and mopeds using the QMB139 engine platform, this variator kit improves belt engagement, throttle response, and acceleration. Whether you're doing maintenance or building a custom setup, this kit provides reliable performance at an affordable price.
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Fits: QMB139 50cc 4-stroke engines (short-case GY6)
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Includes: Drive face, ramp plate, boss, rollers, and backing plate
