Replacement silencer lock cone for the UMS 7-77cc, the seven-cylinder 77cc four-stroke radial from UMS.
Function: it is the cone that locks the exhaust joint.
The reason this ends up on an order: exhaust joints loosen with heat cycles and the lock cone prevents it. Supplied as a pack of 10, which is how these small parts are normally bought — you rarely need just one.
Fitting note: Check the cone is not bottoming before it locks.
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