Chainsaw Repair

Was cleaning up the 2077 cylinder and getting ready to put a NOS piston kit in.   

Doing a much closer inspection.   

Finally getting back into one of my own saws I had bought thats been a problem child since arrived.
Keep breaking rings 2 times, then finally 3rd time fubarred the whole topend. No matter what I tried cleaning up someones past porting.
Think I just found part of the problem looking it over much closer this time around.