Upgrade your scooter's engine performance with this Camshaft Assembly for QMB139 50cc 4-Stroke Engines, complete with 69mm Rocker Arms. Designed for reliable timing and smoother valve operation, this camshaft is a direct replacement for stock setups on most 139QMB-based engines found in 49cc/50cc scooters. Perfect for engine rebuilds or performance maintenance, this camshaft assembly helps restore throttle response and overall engine efficiency.
- Compatible with QMB139 49cc/50cc 4-stroke scooter engines Includes camshaft and 69mm rocker arms for complete top-end replacement OEM-style fitment — no modification required Durable construction for long-lasting performance Ideal for GY6-based engines used in scooters, mopeds, and ATVs Specifications: Engine Type: QMB139 4-stroke Rocker Arm Length: 69mm Condition: Brand New Application: 49cc–50cc Chinese scooters, mopeds, and ATVs (QMB139/GY6) Material: Hardened steel components for durability and precision
