I have a 1978 concord with a minerelli. well I was getting a knock in my motor and my plug tips were getting bent over a hair, I took my head and cylinder off all looked good except my rings were missing a 1/8 inch of the ring itself, I thought this was the way they were supposed to be but when I put the cylinder on, or well started to, I held the rings closed,since there was a gap on them, but they both broke. I am broke with a new baby, and I use this to get to work so my wife can drive our car, were these rings suppose to have a peace missing? and were can I get a cheap set, I mean cheap, I pawned my other moped and this is my only moped left. thanks, I love to keep my knees in the breeze.