Is it normal for gas to come out of the overflow tube?
  • corey_lax
    Posts:49
    Joined:Wed Dec 12, 2007 7:21 pm
    Is it normal for gas to come out of the overflow tube?

    by corey_lax » Tue Jun 10, 2008 5:50 pm

    i'll start off with the relative specs on my bike.
    I have:
    cut the top of airbox
    removed the backfire screen
    pink wire stock.
    removed exhaust baffle
    O ring mod
    42 pilot jet
    fuel screw out 1 3/4
    165 main jet(had 160 on but it would stall after quick snap of the throttle from idle)
    jd red needle on 5th clip from top
    ride from 0 to 3500ft
    temperatures from 40 to 100 degrees

    now... I went for a quick ride around the block with the 160 main jet got back and there was some drops of fuel coming out of the over flow tube. I switched to a 165 main, rode around the block. The bike idles so smooth and rides unreal but when i get back... same old drops of gas coming out of the overflow tube. Is this a normal thing to happen with jetting? Is it from me ripping then shutting it off pretty quick? or should i change something in my jetting?
  • User avatar
    124
    Posts:3704
    Joined:Wed Feb 16, 2005 1:37 pm

    Re: Is it normal for gas to come out of the overflow tube?

    by 124 » Wed Jun 11, 2008 5:45 am

    corey_lax wrote:i'll start off with the relative specs on my bike.
    I have:
    cut the top of airbox
    removed the backfire screen
    pink wire stock.
    removed exhaust baffle
    O ring mod
    42 pilot jet
    fuel screw out 1 3/4
    165 main jet(had 160 on but it would stall after quick snap of the throttle from idle)
    jd red needle on 5th clip from top
    ride from 0 to 3500ft
    temperatures from 40 to 100 degrees

    now... I went for a quick ride around the block with the 160 main jet got back and there was some drops of fuel coming out of the over flow tube. I switched to a 165 main, rode around the block. The bike idles so smooth and rides unreal but when i get back... same old drops of gas coming out of the overflow tube. Is this a normal thing to happen with jetting? Is it from me ripping then shutting it off pretty quick? or should i change something in my jetting?


    Which overflow tube is it coming out of?
    70' Honda CT70 (Trail 70; Gold)
    16' KX450
    16' KX85
    12' YZ125
  • corey_lax
    Posts:49
    Joined:Wed Dec 12, 2007 7:21 pm

    by corey_lax » Wed Jun 11, 2008 6:37 am

    one that comes out right at the float bowl plug...
  • User avatar
    124
    Posts:3704
    Joined:Wed Feb 16, 2005 1:37 pm

    by 124 » Wed Jun 11, 2008 8:20 am

    corey_lax wrote:one that comes out right at the float bowl plug...


    Then this is indicative of your float level too high. Possibles:

    --Your fuel screw o-ring is leaking air past it.
    --You have dirt or foreign debris keeping the main needle and seat from sealing off correctly.
    --You changed your float level by bending the tab on the float itself.
    --The float bowl gasket is leaking air past it.

    Somehow the float level is too high. Allowing air into the bowl via a non-designed pathway, dirty or bad needle/seat, or float adjustment is incorrect...
    70' Honda CT70 (Trail 70; Gold)
    16' KX450
    16' KX85
    12' YZ125
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    mikey526
    Posts:1176
    Joined:Sun Apr 01, 2007 5:29 pm

    by mikey526 » Wed Jun 11, 2008 9:35 am

    124 wrote:
    corey_lax wrote:one that comes out right at the float bowl plug...


    Then this is indicative of your float level too high. Possibles:

    --Your fuel screw o-ring is leaking air past it.
    --You have dirt or foreign debris keeping the main needle and seat from sealing off correctly.
    --You changed your float level by bending the tab on the float itself.
    --The float bowl gasket is leaking air past it.

    Somehow the float level is too high. Allowing air into the bowl via a non-designed pathway, dirty or bad needle/seat, or float adjustment is incorrect...


    Or the drain screw just might not be tightened all the way.. :D I've done that before... :shock: :D
    Image
  • User avatar
    124
    Posts:3704
    Joined:Wed Feb 16, 2005 1:37 pm

    by 124 » Wed Jun 11, 2008 10:05 am

    or that! :roll: :D
    70' Honda CT70 (Trail 70; Gold)
    16' KX450
    16' KX85
    12' YZ125
  • corey_lax
    Posts:49
    Joined:Wed Dec 12, 2007 7:21 pm

    by corey_lax » Wed Jun 11, 2008 12:59 pm

    could it just be the air trapped in the float working its way out? i just had the float plug out to change the main jet and then went for a less than two minute ride. think its just because the air that is inside the float hasnt worked itself out yet? im a carb rookie. i really doubt that theres dirt anywhere tho... i cleaned everything out before taking the carb apart. I might need to tighten the float plug though becuase i changed this out very quickly and might not have tightened it down enough. plus i couldnt get my 17mm socket on properly because the bike was completly put together and not much room.
    thanks for all your help
    corey

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