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Universal Parts QMB139 69mm Valve Rebuild Kit
- Valve Length (intake & exhaust): 69mm
- Shaft Diameter (intake & exhaust): 5mm
- Intake Valve Diameter: 18.5mm
- Exhaust Valve Diameter: 16mm
Universal Parts 69mm Valve Assembly for 50cc 4-stroke QMB139. Includes intake and exhaust valves, inner and outer springs, valve washers, valve seals, valve keepers, and valve retainers.