QMB139 Performance Valve Set, Absolutely Scooters & Supply

Cart ContentsCheckoutMy Account


QMB139 Performance Valve Set

QMB139 Performance Valve Set

Performance QMB139 Valve Set

Replacement QMB139 Valve Set for the Cylinder Heads used on 50cc QMB139 4-stroke engines and engine based vehicles.  Most 50-90cc 4-stroke Chinese Scooters & belt drive ATVs use these unless they have the 69mm tall version, please measure yours before ordering.
  • Intake Valve Diameter: 18.5mm
  • Exhaust Valve Diameter: 16mm
  • Intake & Exhaust Valve Overall Length: 64mm
  • Intake & Exhaust Valve Stem Diameter: 5mm