More than likely, IMHO, they can't be polished up, I feel you are runnin lean, causing excess heat, may be way off here. There is lots of heat runnin stock, but won't blue your pipes, lean will. I feel if you did not re-jet with your new pipes that is the problem, just my thoughts. Ride safe.
Called around today and talked to a few service centers. They also said the same thing about runnin lean. Ok , so I ordered a Cobra jet kit and a couple new spark plugs. This thing is gonna get the carbs cleaned and rejetted before I twist the throttle.
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