Replacement circlip crank shaft for the UMS 7-90cc, the seven-cylinder 90cc four-stroke radial from UMS.
Function: it is the crankshaft retaining circlip.
The reason this ends up on an order: renewed any time the crank is disturbed. Supplied as a pack of 10, which is how these small parts are normally bought — you rarely need just one.
Fitting note: Never reuse a clip that has been removed.
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