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Can't Turn Crank Over

dajackson

CB750 New member
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Hey yall. So I just rebuilt the top end of my 77 k engine. I was manually turning the crank to adjust the lifters, when after one rotation it stopped. I can't rotate it back or forth, and I made sure it's in neutral. If anyone has an idea why or how to fix it, I'd really appreciate.
 
And, depending on the amount of force used, whether you have bent valve there. Easier than you think. Not being able to back up is not a good sign. Was camchain ever tensioned? If slack you may have eaten some of it at crank to lock up both ways.
 
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