2004 CRF450R Sat Forever Carb Issues
  • STSCowboy
    Posts: 1
    Joined: Wed Nov 06, 2019 7:23 pm

    2004 CRF450R Sat Forever Carb Issues

    by STSCowboy » Wed Nov 06, 2019 7:35 pm

    Bike sat forever and Carb needed a cleaning and new pilot jet (clogged) and accelerator pump diaphragm.

    The accelerator pump does not function. I think the check ball in the float bowl is hanging up and not allowing pressure to build and squirt the fuel through the passage in the Venturi.

    I came across this How To Article

    https://www.crfsonly.com/howto/keihin-f ... rf450r.php

    It doesn’t state if this applies to all 2002-2008 CRF450Rs and all diaphragm kits for the bikes. What I need to know is has Honda updated every AP Bowl with the check ball in the new AP Cover that requires the original Float Bowl Check Ball to be removed?
    2004 CRF450R GPR Stabilizer and Sprung for my weight otherwise Stock
  • User avatar
    Posts: 3742
    Joined: Sat Nov 25, 2006 6:31 pm

    Re: 2004 CRF450R Sat Forever Carb Issues

    by JimDirt » Wed Nov 06, 2019 10:45 pm

    Welcome to the site !! \:D/

    I can tell you that I put a 2006 450X bowl on my 2002 450R carb using the 02 pump cover and diaphragm and it worked fine , and I now have a 05 450R carb on my 02 , and I am still using the 06X bowl but now with a Outlaw Racing pump cover and it still works fine ..... if that helps any ....

    I am wondering if you confirmed the linkage rod is moving to push the diaphragm or that the diaphragm is not in backwards or that the spring is not on the wrong side of the diaphragm :-k
    02 CRF450R
    06 CRF450X
    Weiser , Idaho

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