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50cc QMB139 4-stroke 47mm Cylinder Kit- Upgrades to 72cc
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50cc QMB139 4-stroke 47mm Cylinder Kit- Upgrades to 72cc


Score: 5.00 (votes: 1)

50cc QMB139 4-stroke 47mm, Performance Cylinder Kit. Upgrades to 72cc! 

Kit includes cylinder, piston, rings, piston pin, cir clips, head gasket, and base gasket.

*You may need to modify your engine case to accommodate the larger cylinder.

  • $79.99
Qty:  
In stock (20 items available)
  • Upgrades to 72cc
  • Cylinder Bore: 47mm
  • Cylinder Sleeve Outer Diameter: 52.7mm 
  • Wrist Pin Diameter: 13mm
  • Total Piston Height: 34.4mm
  • Compression Height (from center of wrist pin hole to top edge of piston): 17.25mm
    • SKU
      151255
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Score: 5.00 (votes: 1)
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