Complete Valve Assembly for CSC Go., GY6 50cc (139QMB)

Full Valve Assembly for CSC Go, Go MAX, and Pug Scooters

This valve set is a drop-in replacement for the original parts on CSC Go, Go MAX, and Pug scooters that use 139QMB (50cc 4-stroke) engines. With use, the factory valves can wear down and affect how the engine runs. This component is made to bring back proper operation and dependable performance. It belongs to a range of GY6 50cc scooter parts that can help keep your scooter running well.

Signs It Is Time for a New Valve Assembly

Consider replacing the valve assembly if the engine starts to misfire, makes unusual noise, or loses power. Gradual wear can affect the valves and make the engine less efficient. Checking the valves on a regular schedule makes it easier to spot when a replacement is due.

Installation Fit

This valve assembly is built to go straight into the engine in the place of the original piece. Its 5mm shaft diameter and 64mm valve length match the original layout. Correct alignment and seating of the valves are necessary for the engine to work as intended.

Specifications

• Valve Length: 64mm
• Shaft Diameter: 5mm
• Intake Valve Diameter: 18.4mm
• Exhaust Valve Diameter: 16mm
• OEM Part Number: 139QMB
• Fits: CSC go, go MAX and Pug scooters and bikes with 139QMB 50cc 4-stroke engines (64mm valves)

Compatibility

Compatible with:

• Chicago Scooter Company go (139QMB 50cc 4-stroke engine, 64mm valves)
• Chicago Scooter Company go MAX (139QMB 50cc 4-stroke engine, 64mm valves)
• Chicago Scooter Company Pug50 (139QMB 50cc 4-stroke engine, 64mm valves)
• 139QMB-based 50cc and 80cc engines with codes 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD, other QMA and QMB models

How to choose: Compare the engine code on your motor with 139QMB or one of the codes above. Any code that contains QM or FM is listed as compatible.

Shop more: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Cylinder Heads & Valves · Scooter Parts