Cursed fuel system? Carb gremlins?
  • User avatar
    Urban_Cowboy
    Posts:24
    Joined:Wed Jan 25, 2006 9:44 pm
    Cursed fuel system? Carb gremlins?

    by Urban_Cowboy » Mon Sep 07, 2009 3:59 pm

    When I bought my daughter's 2004 CRF100 about a month ago, I knew it needed a little work. But for the price I paid, who cares, plus it has been a great 7-8 hours of father-daughter bonding time getting it back into OEM-spec shape.

    One of the things wrong with it was the carb needed a good overhaul after sitting for over a year. It ran rough when I picked it up and gas leaked from the float overflow.

    So, one of the first things we did was completely flush the fuel tank, clean the petcock, replace the fuel line and rebuilt the carb. The bike ran fine after that, but the float overflow still leaked and the petcock didn't seem to properly stop all flow at 'off'. I tried to adjust the float but no dice. So, I bought a new petcock and (thinking that Chinese rebuilt kit I got the first around must have had inferior parts) new OEM Honda float and float valve. Put it all together and everything seemed fine for a week or so.

    Then it starting leaking out of the overflow again. The petcock is fine when I test it (so was the old one :? )but still allowed minor seepage every once in a while. To remedy this, I installed a secondary fuel shut-off valve in the fuel line- gremlin #1 thwarted, problem fixed.

    But the float overflow still leaks on occasion, mostly after riding the bike for 10-20 minutes. Sometimes it doesn't leak at all, other times it is a steady drip. I have played with the float position three times and the valve is working. I cannot find any debris or particles or anything like that, the parts all look great and work as designed when I inspect them.

    The bike runs great and this is only a minor inconvenience (making sure to shut off the secondary valve each time she stops) but it is frustrating that I cannot make the issue go away permanently. I just wondered if anybody else has experienced the same 'gremlins' and if so, how did you kill them?

    Thanks
    2005 Honda CRF450X Adventure Motard
    2004 Honda CRF100F
    2004 Honda CRF50F
    1989 Honda NX250
    2002 Honda CR250R
    1998 Honda VTR1000
    2006 Buell XB9SX
    2001 Aprilia RS50/68
    2009 Aprilia SR50 R Factory
  • User avatar
    marks crf
    Posts:1138
    Joined:Thu Jun 05, 2008 12:28 am

    by marks crf » Mon Sep 07, 2009 11:39 pm

    i believe water kills gremlins :lol:
    my #00

    5th gear PINNED on the 250
    6th gear PINNED on the 125

    My van is the only TRUE factory rig
  • Aussiecrf230
    Posts:1964
    Joined:Fri Jan 06, 2006 11:11 pm

    by Aussiecrf230 » Tue Sep 08, 2009 2:28 am

    Mark obviously thinks the gremlins have been fed after midnight.

    Try taking the float out and let it sit in some fuel for a while. See if it still floats properly after a half hour or so.
    Assume it is not catching on something every now and then.
    Ray
    Australia

    CRF230F 2004
    C30F Power Up needle
    Mains 132
    Idle 45
    2 turns out
    Baffle out, Screens In

    It starts,it runs,it gets to where all CRFs can get to without the valve or valve plate dramas
  • jrboatin
    Posts:15
    Joined:Tue Jun 27, 2006 10:10 am

    by jrboatin » Sun Sep 20, 2009 4:43 pm

    For the right price you can have mine.. I installed a complete BBR kit and have the origianl carb in my tool box.......


    What ya think ? Toss a number and pay shipping you can have it.....

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