Chainsaw Repair

Dont think it is the bevel now after doing that yesterday.  Thinking someone went to wide and that has something to do with it. Then again I could be wrong.
Was going to try and get time to measure and or compare to a stock port on piston today. 

The way the ring sticks out the ext port after breaking seems weird and I am WAGing for ideas to why. I thought it was beveling was not enough by whoever did it. Fixed that part I thought, so WAGing to other things as to why. Ring breaks right in the middle and right in the center of the ext port area.

Ball hone was used on 1st clean up and then again after adding beveling 2nd time.

Funny listening to it while it is running for the tell tell sound of when the ring cracks.  Pretty wild sound from a saw.