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44mm Stroker Crankshaft Assembly for 50cc 4-stroke QMB139 engines.

  • 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
  • Connecting Rod Inner Diameter: 13mm
  • Number of Teeth (oil pump drive gear): 16

  • QMB139 50cc/49cc​​​​​​​

SSP-G QMB139 Stroker Crankshaft

    Toll Free 1-877-701-0111 

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