A cylinder assembly to suit the UMS 9-99cc — the nine-cylinder 99cc four-stroke radial from UMS.
On this engine the component is a complete cylinder assembly — barrel, liner and the associated hardware ready to fit on the crankcase.
Why this part matters: replacing a cylinder as an assembly is how a top-end overhaul is normally done, since the barrel and liner are matched.
Fitting note: Check the mating face for flatness and fit a fresh base gasket.
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