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I am looking at a 1984 Honda Nighthawk CB700sc with a bent valve and it seems replacing the engine is easier and more economical than trying to repair the bent valve. There do not seem to be many CB700 engines for sale so what would be a good alternative? Would a similar year CB750 be an easy direct replacement? Thanks and stay safe!
 

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A good question. I had an '84 CB700SC (and I loved it).

Somehow I seized one of the pistons so I decided to replace it. I removed the cylinder head and the affected piston and reassembled it all. I took it all apart in a clean and orderly fashion on a folding card table. After reassembly it worked like a champ!

What I'm getting at is that if a valve is available it might be cheaper and easier to just replace the valve. If I recall, the CB700SC is a much different beast than the CB750. The SC is actually a quite high-revving, high-performance 16-valve engine and I suspect it's not a direct swap with the non-SC engine. But you never know.
 
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