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Message: [QUOTE="griffbones, post: 1188106, member: 72285"] Not for sure. But doesn't it mean the chamfering around the bridge between the exhaust ports? Why would the factory original piston do this, especially after running for a few hours previous to the failure? Not trying to argue at all and I really really apreciate all of your help. I am just trying to wrap my head around this whole deal so that I can avoid it from happening again, I really can not afford ($$) to just guess. [/QUOTE]