Do you need to re jet if you put a fmf q4 exhaust on a 2010 KLX250s?
1 reply to this topic
Posted 27 April 2012 - 09:59 PM
Thinking about putting a different exhaust on my bike and was wondering if you have to re jet?
Posted 28 April 2012 - 06:44 PM
Hard to say for only a Q4 upgrade, but if you're increasing air/gas flow through the intake/exhaust system, you'd likely want to richen it up just a little. These bikes are awfully lean with stock configuration...