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fmf q4 on crf250 r 2008
  • pakman23
    Posts:4
    Joined:Thu May 05, 2011 5:35 pm
    fmf q4 on crf250 r 2008

    by pakman23 » Sat May 21, 2011 7:26 am

    install this new pipe and seems to have lost mid range power. do i need to get a jetting kit
  • Keith72
    Posts:68
    Joined:Sat Jul 31, 2010 11:22 am

    by Keith72 » Mon May 23, 2011 5:29 pm

    Have you tried adjusting the fuel screw? Changing the exhaust doesnt usually require a jetting change. Unless it wasnt correct to begin with.

    Your jetting should be in the 45 pilot, 172-175 main area. Thats where I have mine on an 09 crf250r. Runs great and starts easy. I have an FMF 4.1 with the megabomb.
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    crfsonly
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    Joined:Thu Apr 01, 2004 3:45 pm

    by crfsonly » Mon May 23, 2011 5:35 pm

    possibly. depends on where your jetting was previously and what exhaust you had then. did you do any other mods at the same time?
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