New and used early non YCIS 650 engine parts.

I'm refurbishing an '82 650 Seca. I recently found a low mileage engine so I can liquidate all of the old engine+new cam chain,primary guide,clutch plates set & a low mileage primary chain. The engine did run quite well but on opening it up I found 1 bad exhaust cam bearing and a stuck ring in one cylinder that had gotten a bit of water in it. The barrel is slightly pitted but not so much as to really need boring. I'm swapping all the case covers as this is a Maxim engine and the shift linkage isn't the same and the black covers look nicer to me. Everything but the carbs & filter cover are available. John Pierson,Champlin,Mn- piers006@tc.umn.edu, 763-427-8054