HELP Gasoline leaking from carburetor overflow
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  1. #1
    Junior Member Rookie
    Join Date
    Jan 2020
    Posts
    7

    HELP Gasoline leaking from carburetor overflow

    Any ideas on how to fix this?

  2. #2
    Senior Member KTMATVHQ Guru
    Join Date
    Dec 2008
    Location
    Billings, MT
    Posts
    1,099
    If it's continually leaking on flat ground with the fuel turned on you'll have to get into the carb and check it out. Could be something as simple a piece of gunk stuck in the needle and seat not allowing it to close. If you find pieces of black rubber in there the fuel line or rubber in the petcock may be degrading. The needle and seat could be bad, or there may be something wrong with the float itself.
    Mine:
    2017 Husky FX 450
    2009 505 SX
    2008 525 XC-modded for mx (currently 450 cylinder)
    Dad's:
    2009 450 SX
    2008 540 XC

  3. #3
    Junior Member Rookie
    Join Date
    Jan 2020
    Posts
    7
    I rode it yesterday shortly after the leak slowed. It stopped leaking for the night and I just checked it and it is leaking again but only a little. I have a bowl underneath which has very little fluid in it. I’m pretty sure I turned the fuel off so I’m not exactly sure why this is happening.

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  5. #4
    Senior Member KTMATVHQ Member
    Join Date
    Nov 2015
    Posts
    368
    Float stuck or not set right.
    If that’s not the case, the float valve seal is not sealing all the way and allowing unwanted fuel to come in and overfill the bowl. It overfills for the point it goes out the vent tubes.


 

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