Replace a damaged or worn engine case with this Complete Right Crankcase for QMB139 50cc 4-Stroke Engines. Engineered to OEM specifications, this crankcase is designed for GY6-style 139QMB engines commonly found in 50cc Chinese scooters. It houses the crankshaft, transmission components, and kickstart mechanism, making it a critical part of the engine’s bottom end. Whether you're doing a full engine rebuild or replacing a cracked case, this right-side crankcase offers durability, fitment accuracy, and long-lasting performance.
- OEM-style right crankcase half for QMB139 50cc engines Precision-machined for perfect fit and alignment Compatible with stock crankshaft, kickstart, and transmission components Made from high-strength aluminum alloy for optimal durability Direct replacement for many Chinese 50cc GY6-style scooters Specifications: Engine Type: QMB139 (GY6 50cc 4-stroke) Side: Right crankcase half Material: Cast aluminum Compatibility: TaoTao, Bintelli, Peace Sports, Jonway, and other GY6 50cc scooters Condition: Brand New Includes: Crankcase only (no bearings or seals unless noted)
