Here at D& M Engineering we offer a wide variety of services. Although our main focus is on classic road and classic race machines (and in particular classic Honda race machines) we work on all types and makes.  Cylinder head section.  Cylinder head skimming.  Valve guide removal and replacement  Valve seat removal, replacement and cutting.  Valve re-facing   Spark plug thread repaired and inserts fitted.  Cylinder head damage repairs  Alloy and cast welding repairs and fin repairs    Full cylinder head gas flow and tune on all four stroke machines for road, race, super moto,  moto x  & enduro   Cylinder section    Cylinders re-bored  and pistons provided.  Road or competition  Replacement cylinder liners made to order, fitted and bored  Cylinder re-plating service  Cylinder repairs made and fin repairs  Alloy and cast welding repairs   Crankshaft section    Crankshaft stripped and rebuilt. Replacement con rod kits provided. Plain bearing crankshafts reground to size. Crankshafts lightened and balanced. New and used spares  Tuning parts Engine rebuild and tuning service Machining TIG welding Gas welding Frame modifications Complete bike rebuilds & restoration   With our partners we can also offer