A rocker arm pin to suit the UMS 5-260cc — the five-cylinder 260cc four-stroke radial from UMS.
On this engine the component is the rocker arm pin, which the rocker pivots on.
Why this part matters: a worn pin is what causes rocker rattle and inconsistent valve clearance. Supplied as a pack of 2, which is how these small parts are normally bought — you rarely need just one.
Fitting note: Replace pins and arms together when either is worn past limits.
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