Universal Parts 50mm QMB139 Non Emissions Head - 69mm Valves

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SKU: 151-266
Restock: Late September

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Current Stock: 27

50cc QMB139 4-stroke 50mm, Non Emissions Cylinder Head with 69mm Valves for use with 81.3cc Big Bore Kit! (See Related Items)

*You may need to modify your engine case to accommodate the larger cylinder.
  • For Use With 81.3cc Big Bore Kit
  • Valve Length: 69mm
  • Overall Height: 59.5mm
  • Intake Port Diameter: 18mm
  • Exhaust Port Diameter: 17mm
  • Intake Bolt Hole Spacing: 44.5mm
  • Exhaust Bolt Hole Spacing: 50mm
QMB139 50cc/49cc , Various unlisted makes/models

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