Gas coming out overflow tube on carb

Discussion in 'Bike Mods, Performance, Maintenance & Repair' started by sprocket218, Mar 30, 2007.



  1. sprocket218

    sprocket218 Rookie DRN Member

    Joined:
    Aug 25, 2006
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Good morning,

    Quick question, my bike won't start and as soon as I turn the gas on, it just flows out of the overflow tube. Is the float stuck? Thanks,
    Nancy


  2. zero_it

    zero_it Subscriber

    Joined:
    May 20, 2000
    Messages:
    287
    Likes Received:
    0
    Trophy Points:
    0
    Yes. Either (1) the float level is set too high, (2) the needle and/or seat are worn and not shutting off, (3) the float has a hole in it and has sunk in the bowl or (4) the float is hung up on something and stuck in the open position. Better do a tear down inspection and figure out what's up.
  3. rmc_olderthandirt

    rmc_olderthandirt Subscriber

    Joined:
    Apr 18, 2006
    Messages:
    1,530
    Likes Received:
    8
    Trophy Points:
    38
    If the gas just pours out, the float is stuck. If you get a slow drip then it is more likely a faulty needle valve.

    Sometimes if give the bike a good shake the gas sloshing around in the bowl will jar the float loose. A few gentle taps on the side of the carb can also free it up.

    It is possible that the float stuck due to a bit of gas/oil that turned to goo in the needle valve and once you break it loose it will be fine. If the problem keeps returning you need to tear the carburetor apart and fix it proper. It is possible that just a good cleaning of the needle valve and seat (do NOT use carburetor cleaner on the needle valve seat!) will take care of it, but I generally prefer to pay the $20 for a new set.

    Rod



Similar Threads: coming overflow
Forum Title Date
Bike Mods, Performance, Maintenance & Repair 98kx125 coolent always coming out of overflow...?? Mar 28, 2003
Bike Mods, Performance, Maintenance & Repair 98 yz400f. fuel wont stop coming out Jul 28, 2010
Bike Mods, Performance, Maintenance & Repair 2004 TTR125 dies when coming to a stop Oct 28, 2008
Bike Mods, Performance, Maintenance & Repair 2001 CR 250 Cylinder Plating coming off Oct 10, 2008
Bike Mods, Performance, Maintenance & Repair coolent going into my oil and blue smoke in coming out off my muffler Sep 20, 2008

Share This Page