Description
Universal Parts 64mm 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.
Valve Length (intake & exhaust): 64mm
Shaft Diameter (intake & exhaust): 5mm
Intake Valve Diameter: 18.4mm
Exhaust Valve Diameter: 16mm