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Hoca 50cc QMB139, Performance Cylinder Kit
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Hoca 50cc QMB139, Performance Cylinder Kit

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We recommend that you use our part #169-70 cylinder head with this set as some stock cylinder heads will not fit.

  • Upgrades to 80cc
  • Cylinder Bore: 50mm
  • Wrist Pin Diameter: 13mm
  • Total Piston Height: 34.8mm
  • Compression Height (from center of wrist pin hole to top edge of piston): 18.3mm
List Price: $164.99
Price: $149.99
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