A sensor lock screw to suit the UMS 7-50cc — the seven-cylinder 50cc four-stroke radial from UMS.
On this engine the component is the sensor locking screws that hold the pickup in position.
Why this part matters: a screw that backs out lets the sensor move and the timing drift, so these are replaced at service. Supplied as a pack of 10, which is how these small parts are normally bought — you rarely need just one.
Fitting note: Use the correct torque and check the air gap afterwards.






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