GY6 50cc (139QMB) Rocker Arms for 69mm Length Valve
ITEM# TT-15972
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Description
Rocker Arms for 50cc 4-Stroke Engines
These rocker arms are built for cylinder heads that use 69mm valves on 50cc QMB139 4-stroke engines. Correct valve action is central to good engine output, so this component plays a direct role in how the engine runs. It belongs to the range of GY6 50cc scooter parts often looked at when troubleshooting weak compression or a ticking noise. Swapping out worn rocker arms can help the engine breathe properly and can stop further wear from developing.
Signs It Needs Changing
Consider replacing the rocker arms if you hear ticking, notice low compression, or find burnt valves. Any of these may point to the need for work on the cylinder head to get the engine running correctly again. Before fitting a new set, check that it suits your cylinder head's bore size and engine code.
Specifications
- Size: 55.5mm
- Fits: Universal GY6 50cc 4-stroke QMB139 engines with 69mm valves
Compatibility
Suitable for:
- Baja SC50
- Kymco (69mm valve heads)
- Panterra (69mm valve heads)
- QMB139 50cc/49cc engines (69mm valves)
- Qingqi (69mm valve heads)
- Roketa (69mm valve heads)
- SUNL (69mm valve heads)
- Various unlisted makes and models with 69mm valve heads
How to choose: Make sure the valve length on your head matches. This part is intended for heads with 69mm valves and measures 55.5mm in length.
Browse further: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Cylinder Heads & Valves · Scooter Parts
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