This exhaust adds some good power low and mid sound excellent
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Along with rejetting, opening up the air box and a stage1 cam my new FMF power bomb exhaust made my crf250x a completely different bike...Love it!
thisisi the most expensive aftermarket piece I ahve personally bought. So I was skeptical at first, but just adding the pipe, it cleaned up the power delivery, and added some much needed ponies.
We developed these specs with a 32:1 fuel to oil mixing ratio of a 50/50 mix of race fuel and super unleaded, 0 - 1500 ft altitude at 70 degrees outside temperature.
Please note: There are way too many variables in jetting to give you a recommendation that works perfect. Use these specs for a reference to help aid you with your specific bike.
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