Crankshaft 101 OCTANE 22-tooth oil pump drive 139QMB/QMA

Original-quality aftermarket crankshaft for 50/90cc 4-stroke engines (GY6 50, 139QMB/QMA). The crankshaft is pre-pressed with main bearings and connecting rod. GY6 engines are factory-fitted with two different crankshaft versions. The only difference is the oil pump drive cog on the right-hand side. The old version, installed in almost all vehicles, has a 16-tooth cog. The new version has 22 teeth and is used in, for example, Rex models. For added assurance, count the number of teeth on your cog and compare it with the provided image. This crankshaft has 22 teeth and can be fitted to vehicles that use the 16-tooth variant if items BT14782 + BT14783 (oil pump and oil pump drive cog) are fitted.