Replacement sensor screw for the UMS 5-100cc, the five-cylinder 100cc four-stroke radial from UMS.
Function: it is the sensor mounting screws.
The reason this ends up on an order: renewed when the sensor is replaced or when the heads are damaged 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 overtighten — a distorted plate changes the air gap.
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