Jake
CB750 New member
I have a 1980 CB 750 I acquired a couple years ago. The engine only had about 120 pounds per cylinder so I rebuilt the engine new pistons 823 Wisconsin and had to cylinder head with all valves redone. All work was done by a professional machine shop. Did reassembly with All punch marks and locations exactly as specified now I only have 125 pounds for cylinder. I warmed the engine up approximately 1/2 hour still reading 125 pounds per cylinder. I am coming up with low compression and also on the vacuum side. I am reading late valve timing. Can the crankshaft chain stretch enough where it would give me these issues and if so can I slip the crankshaft chain one tooth without having to split the lowercase.