Hoca 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





    • KPM169-239-112