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Message: [QUOTE="Micahdawg, post: 885346, member: 21668"] Forgive my questions....but how exactly does the skirt of a piston slap the cylinder. If the piston and cylinder bore wear out with use...the bore increases and the piston's overall size decreases. Wouldn't this increased tolerance reduce any chance of the piston slapping the cylinder? Or is it the play that developes in the wrist pin that allows the piston to contact the cylinder? The bike does run a little hot...but the left radiator ain't the greatest. Never seemed to pop or experience hard starts. I also decreased the pilot jet from 55 to 52. FMF suggested it and I wasn't sure if that was a problem when chacing down my bog. Micah [/QUOTE]