A cylinder head assembly to suit the UMS 5-180cc — the five-cylinder 180cc four-stroke radial from UMS.
On this engine the component is the cylinder head assembly, carrying the combustion chamber, valve seats and the rocker gear for that cylinder.
Why this part matters: heads are replaced or reconditioned when valve seats recede, a valve burns or a spark plug thread is stripped.
Fitting note: Check head flatness and fit a new head gasket; re-torque the head screws after the first run.
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