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!
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header
You May Like
Write your review and you'll automatically be entered in our monthly drawing. Include an image or video to DOUBLE your chances to win!Write Your Review
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.
Make Your Selections
it will need to be programmed.
For power gains from installing an exhaust product, that varies with the machine, modifications and the tune of the carburetor. Expect at least to shift where the power is delivered during the RPM range and do not expect PEAK HP gains.