I just bought a used 99 kdx200 ,did'nt really notice how much racket the engine makes while idling till i got it in my garage! wow! this is with a stock pipe.seems quieter while reving it up,but loud rattilling when at idle,is this normal? people have told me it's just another KDX! true? The bike seems to run strong? a little smoke but seems to pull good. Am I worring about the noise for nothing? thanks for any input.