Replacement Crankshaft GY6 50cc 139QMB / QMA (16 Teeth)

Genuine quality replacement crank for 50/90cc 4-stroke engines (GY6 50, 139QMB/QMA). The crank is pre-pressed with main bearings and connecting rod. GY6 engines are factory fitted with 2 different crank versions. The only difference is the oil pump drive sprocket on the right side. The old version, installed in almost all vehicles, has a 16-tooth sprocket. The new version has 22 teeth and is used for example on Rex models. For added assurance, count the number of teeth on your cog and reference yourself with the image provided.

Genuine quality replacement crank for 50/90cc 4-stroke engines (GY6 50, 139QMB/QMA). The crank is pre-pressed with main bearings and connecting rod. GY6 engines are factory fitted with 2 different crank versions. The only difference is the oil pump drive sprocket on the right hand side. The old version, fitted in almost all vehicles, has a 16 tooth sprocket. The new version has 22 teeth and is used for example on Rex models. For greater certainty, count the number of teeth on your cog and reference yourself with the image provided.