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If you read up on your Norton engines, the 750's built in 1973 were not built to Combat spec, and were referred to as Mk 5 (or Mk V). They no longer had shaved heads to give higher compression, and without pulling out the books, no performance cam fitted either....? hth.This is really basic stuff, any Norton history book gives this info...
If you read up on your Norton engines, the 750's built in 1973 were not built to Combat spec, and were referred to as Mk 5 (or Mk V). They no longer had shaved heads to give higher compression, and without pulling out the books, no performance cam fitted either....? hth.
This is really basic stuff, any Norton history book gives this info...
