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Big Bore Head - Universal Parts 50mm QMB139 Complete Non Emissions Cylinder Head 64mm Valves > Part#151GRS265

  • $ 5999

Grand Rapids Scooter Engine Parts

50cc QMB139 4-stroke 50mm, Non Emissions Cylinder Head with 64mm Valves for use with 81.3cc Big Bore Kit!

  • For Use With 81.3cc Big Bore Kit
  • Valve Length: 64mm
  • Overall Height: 59.5mm
  • Intake Port Diameter: 18mm
  • Exhaust Port Diameter: 17mm
  • Intake Bolt Hole Spacing: 44.5mm
  • Exhaust Bolt Hole Spacing: 50mm


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