39mm Stock Cylinder Kit for 50cc 4-stroke QMB139 engines. Includes cylinder, piston, pin, circlips, rings, head gasket and base gasket.

  • Bore: 39mm
  • Overall Height: 70mm
  • Cylinder Sleeve Outer Diameter: 44.7mm

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QMB139 39mm Cylinder Kit $42.99 FREE SHIPPING

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