Oil leak on cylinder

Chrish70

CB750 Member
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I have put new rings, and installed a new rebuild gasket kit on my 1979 Cb750K. There is an oil leak that I am struggling to determine the cause. *the cylinder was from another bike because the original had a crack. I did not have it deck flattened because it looked ok. It was serviced lightly with a hone. I am seeking guidance on what to look for in this leak. I am not sure if the rods had o rings originally or that I put o rings back on the rods. Could that cause a leak? I plan to replace gaskets and start over.
 
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