Description
Exhaust Valve for 50cc QMB139 Engines
This exhaust valve is specifically designed for 50cc 4-stroke QMB139 engines. It measures 69mm in overall length, with a diameter of 16mm and a shaft diameter of 5mm. As one of the necessary GY6 50cc scooter parts, it plays a key role in ensuring your engine breathes properly. Replacing this valve may be necessary if you experience low compression or valve-related issues.
When to Replace It
If your engine is showing signs of low compression, ticking sounds, or burnt valves, it's time to consider replacing the exhaust valve. Ensuring the cylinder head matches your engine code and bore size is important for maintaining performance.
Specifications
- Diameter: 16mm
- Shaft Diameter: 5mm
- Overall Length: 69mm
Fitment
This exhaust valve fits various models of 50cc and 49cc engines, specifically designed for QMB139 configurations.
- QMB139 50cc
- QMB139 49cc
Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.
Shop more: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Cylinder Heads & Valves · Scooter Exhausts & Mufflers · Scooter Parts
Customer Reviews
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.