UMS 5-100cc CRANK CASE ASSEMBLY

Genuine UMS crankcase assembly to suit the UMS 5-cylinder 100cc radial. It locates the main bearings and the cylinder mounting faces, which is why UMS supplies it as a matched assembly rather than as a bare casting.

Genuine UMS component. Check main bearing condition and crankshaft runout before reassembly, and renew gaskets and seals as a set.