49cc Crankshaft 22T for GY6-50 QMB139 49-80cc Scooter Motors. Click Here for specs and fitment:

This 49cc Scooter Crankshaft has a 22th Oil Pump Drive Sprocket. Please be sure to check this prior to ordering. If yours has a 16th sprocket, order part # 633509.
Overall Length: 247mm                                                                                                                Oil pump drive sprocket =22 teeth                                                                                          Thread Size (tapered side): M10x11.5mm
Thread Size (spline side): M12x15mm
Bearing Outer Diameter (tapered side): 42mm
Bearing Outer Diameter (spline side): 47mm
Number of Splines: 26
Thin Gear=17th Thick Gear=16th