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Jetting with a new pipe
  • Timboe59
    Posts:2
    Joined:Thu Feb 07, 2008 1:45 pm
    Jetting with a new pipe

    by Timboe59 » Thu Feb 07, 2008 1:53 pm

    I am kind of new to the world of 4 strokes. I have an 06 CRF450R and recently bought a white brothers pipe for it. The instructions say to use a 158 main jet, but i feel this is to lean for the type of riding i do. i am racing in the US Desert Racing series in red mountain. Mostly 2500-5000 ft. does anyone have any suggestions? Thanks
    Andy
  • Asmith
    Posts:14381
    Joined:Mon Apr 10, 2006 7:52 am

    Re: Jetting with a new pipe

    by Asmith » Thu Feb 07, 2008 2:43 pm

    Timboe59 wrote:I am kind of new to the world of 4 strokes. I have an 06 CRF450R and recently bought a white brothers pipe for it. The instructions say to use a 158 main jet, but i feel this is to lean for the type of riding i do. i am racing in the US Desert Racing series in red mountain. Mostly 2500-5000 ft. does anyone have any suggestions? Thanks
    Andy


    Yeah, don't listen to the instructions from White Bros.

    Way too lean. We use a 158 in a stock exhausted CRF 250X. I would think a 172 or 178 might be more fitting.
  • Timboe59
    Posts:2
    Joined:Thu Feb 07, 2008 1:45 pm

    by Timboe59 » Thu Feb 07, 2008 7:03 pm

    Do you think the JD Jetting kit would be a good idea?
  • crf450x4me
    Posts:13
    Joined:Tue Aug 16, 2005 5:26 pm

    by crf450x4me » Sat Feb 23, 2008 7:07 pm

    165 or 170 main
    2005 CRF450X
    JD Jet kit
    WB FX4 Exhaust
    removed screen from air filter cage
    Acerabis rally pro hand guards
    White Bros. smog block off kit
    Pink wire mod.RETURNED TO STOCK
    BRP Chain guide
    Flatland skid plate
    3.2 Gal IMS tank
    IMS Pro Series Pegs
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