Complete rocker arm assembly for GY6 Chinese engines.

This is a complete assembly including valve adjusters fits 50cc 4-stroke Chinese 139QMA/B mopeds.

This is suitable for cylinder heads that use short 64mm valves (not suitable for cylinder heads using the longer 69.5mm valves).

Note: there is no reliable way to know which valve length you have without removing the cylinder head and measuring the valve.

Set your valve clearances to 0.1mm after fitting!