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Crankshaft, Type-1 GY6 49cc QMB139 > Part # 151GRS19

  • $ 5999

Grand Rapids Scooter's Crankshaft Assembly, Type-1 for 50cc 4-stroke QMB139 engines. Has 16 tooth oil pump drive gear.

Supported Models: Bintelli, Tao Tao, Peace Sports, Wolf, Schwinn, Puma, SYM, Alliance, Motorino, and Kymco.


  • Stroke: 41.4mm
  • Overall Length: 247mm
  • Thread Size (tapered side): M10x1.25
  • Thread Size (spline side): M12x1.25
  • Bearing Outer Diameter (tapered side): 42mm
  • Bearing Outer Diameter (spline side): 47mm
  • Number of Splines: 26
  • Number of Teeth (oil pump drive gear): 16

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