GY6 50cc (139QMB) Exhaust Valve - 64mm

64mm Exhaust Valve Built for 50cc QMB139 Engines

This exhaust valve is designed for 50cc 4-stroke QMB139 engines, aiming to support better engine output and efficiency. It plays a central role in how effectively your engine exchanges gases. If you spot symptoms such as weak compression or ticking sounds, this component may need to be swapped out. It's one of the key GY6 50cc scooter parts for keeping your engine in good working order.

Signs It Needs Replacing

Wear indicators like ticking noises or burnt valves suggest the part is due for replacement. Keeping the cylinder head, valves, and camshaft in good condition is essential for consistent engine performance.

Specifications

• Valve Diameter: 16mm
• Shaft Diameter: 5mm
• Overall Length: 64mm
• Fits: GY6 50cc (QMB139) 4-stroke engines, 64mm exhaust valve

Compatibility

Compatible with:

• GY6 50cc QMB139 4-stroke engines

How to choose: Confirm your engine is a QMB139 50cc 4-stroke, and verify the valve measures 64mm overall length with a 16mm head and 5mm shaft.

Browse further: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Cylinder Heads & Valves · Scooter Exhausts & Mufflers · Scooter Parts