We have the capability of boring, sleeving, and resurfacing cylinders. MMM&P is experienced in rebuilding crankshafts for marine, ATV, snowmobile, and motorcycle engines. To keep your sled running at its peak performance, Manitowoc Motor Machining & Parts can: Mill heads Install thread repairs Any other machine operation needed on 2 or 4 cycle heads, cylinders and crank cases. We can install seats and guides, weld, machine, install thread repairs, and do multi-angle valve job on ANY motorcyle head.  We can also balance clutches and secondaries.