Replacement carburettor lock screw for the UMS 5-125cc, the five-cylinder 125cc four-stroke radial from UMS.
Function: it is the carburettor locking screws holding the carburettor to its mounting.
The reason this ends up on an order: renewed at overhaul or when threads are stretched from repeated removal. Supplied as a pack of 10, which is how these small parts are normally bought — you rarely need just one.
Fitting note: Do not over-torque — the carburettor body is softer than the screw.
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