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2015 CRF 250X

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If I modify the exhaust on my sons 2015 250x will I have to put in a jetting kit. I just want to hear him when we are riding as my bike is loud

Edited by Ktoddmx66

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I don't have a whole lot of experience here but what many people on here have told me is that you may have to depending on how much you do. When you change anything that alters the flow it'll in turn alter the fuel mixture.

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