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Anyone run with your baffle installed?

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Anyone with a wr400 or 426 ride your bike with the stock muffler with the baffle installed? Ive noticed with my 400 it runs a little cruddy with the baffle and wont idle. Without the baffle, it runs and idles fine. I would assume this has to do with jetting, and would prefer keeping the baffle in to keep it quiet. My only concern is when its jetted correctly, will it run too hot? Or would I be better off with the PMB insert?

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