2015 CRF 250X

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

Make your bike quieter, and you won't have to do anything to his bike.

We have three bikes two are loud and we ride with other people to.

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.

Any change in the exahust must be matched in the intake and the jetting.

 

Go to the 250X forum and read the FAQ's and jetting thread

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