center piston fried

[ryno2324]

I fried my center piston of my 900ZXI because of a carb that was not properly jetted (too lean). I have a few small scratches that can be felt in the cylinder. Is it necessary to bore all three cylanders and buy new pistons or can I just replace the bad piston and tune the carb? What can go wrong by not boring all the cylinders? How much life can I expect out of the motor by just replacing the bad piston? The other two pistons and cyinders are fine. SBT rebuilt less than 100 hours ago.

[Technical Support]

Re: center piston fried

Clean carbs are important for the engine to live a good long life. Carbs should be inspected at the begining of every season, This means a quick look inside the carbs, they will not always need rebuilding. If the damage is afew light scratches you might be ok with honing and a new piston. Tom SBT tech.