rejetting carb

i just put a new exaust system on my crf230, and i was told i have to rejet the carb, it this true/ if so how hard is it t do by urself?


Most likely (if even) a main jet change.

What I would do, is ride the bike first to see how it runs. If it was slightly rich before, it might be spot on now. See how it goes.....

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