Universal Parts 47mm QMB139 Cylinder Kit

This Universal Parts 50cc QMB139 4-stroke 47mm, Performance Cylinder Kit upgrades your bike to 72cc! NOTE: You may need to modify your engine case to accommodate the larger cylinder. Specifications: Includes cylinder, piston, rings, piston pin, circlips, head gasket, and base gasket Upgrades to 72cc Cylinder Bore: 47mm Cylinder Sleeve Outer Diameter: 52.7mm Wrist Pin Diameter: 13mm Total Piston Height: 34.4mm Compression Height (from center of wrist pin hole to top edge of piston): 17.25mm Compatibility: 139QMB-based 50cc / 80cc engines with the following engine codes: 139QMA 139QMB 1P39QMB 1P39QMA-2 YN139QMB JJ1P39QMB 139FMA-2 BD1P39QMB BN139QMB 147QMD Other QMA models Other QMB models Don't see your engine listed? If the engine code includes "QM" or "FM", this product is compatible with your vehicle. About Universal Parts: Universal Parts is a line of quality and affordable replacement parts for Chinese scooters! From basic items like bearings and cables all the way up to complete engine assemblies and affordable big bore kits, the comprehensive Universal Parts line can help you get your scooter riding again. This product is not intended for use on public roads or land.