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gas coming out of my 83 maxim 650 filter area

Discussion in 'XJ Technical Chat' started by silverdollar, Jul 4, 2011.

  1. silverdollar

    silverdollar Member

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    So my house has been smelling like gas because the garage is connected to the house and I notice a strong smell coming from the garage.
    I found out right where the filter box is connected there is a little bit of gas coming on, not a lot to cause a leak on the floor but enough to smell the garage and the house with gas fumes.

    Now the bike is running and hasn't been ran in a week. I also found that the air filter box was not connected. There is no cracks in the hoses and all the hoses were connected to the gas tank.

    So what can be the problem?

    Also if someone can post some pictures of where they relocated there battery box that would be great. I am going for the bobber look with the rear shocks still attach. I am not hard tailing it, just to give you an idea of what I am trying to do.

    Thank you all
     
  2. JFStewart

    JFStewart Member

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    Sounds like the fuel valve (petcock) is either in the "PRIme" position or is faulty and the needle in one or more carbs is sticking.
     
  3. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    To elaborate:

    The stock petcock shouldn't flow fuel in the "ON" (or RES) position unless the motor is running; in PRI it flows all the time.

    The float valves in the carbs SHOULD shut off fuel flow so that the condition of the petcock wouldn't matter; however, yours aren't. This could mean that the float valves are gummed up or loaded with crud; or that one or more floats are not properly adjusted.

    SO: If you left the petcock on PRI, you simply have a carb float problem. If the petcock is in ON or RES you also have a petcock problem.
     
  4. silverdollar

    silverdollar Member

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    The petcock is in the ON position so it must be the petcock valve.
     
  5. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    AND the floats (or a float.) If your floats were all working correctly you could leave it on PRI and it wouldn't overflow. You have a two-pronged problem.
     
  6. silverdollar

    silverdollar Member

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    I need a little more detail regarding the two-prong.

    Thanks
     
  7. project1

    project1 Member

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    he simply means two problems instead of one. you have an issue in the lower half of the carburetor(s) AND an issue with your fuel petcock. if you're opening your carbs why not clean them thoroughly and replace anything worn to have piece of mind? use this guide http://xjbikes.com/Forums/viewtopic/t=2 ... n+own.html and you can learn a lot here as well http://xjbikes.com/Forums/viewtopic/t=14561.html scroll down to the carb parts and enjoy the reading. i'm quickly learning these bikes aren't hard to fix if you're willing to learn. the knowledge is all here. good luck
     
  8. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Correct. A leaky petcock alone won't cause your issue; the carbs SHOULD stop the "extra" fuel.

    They're not. That's problem one, a float issue of some sort.

    The petcock should shut off when the motor does, and not be feeding extra gas to the carbs.

    It's not. That's problem two. Petcock probably needs a rebuild.

    It takes BOTH a petcock that's not shutting off fuel flow AND a carb float issue to produce your symptoms. You have two problems to fix.
     
  9. project1

    project1 Member

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    as far as photos for airbox relocation, check the photo gallery (which is large) and see if you can find an example you're looking for. then maybe contact one of those owners.
     
  10. silverdollar

    silverdollar Member

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    Thanks for the info. Do you think I should go with a rebuild for the petcock or buy a new for piece of mind?
     
  11. TwigMonster

    TwigMonster New Member

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    My bike just started leaking gas a couple of days ago. Seems like it's the same issue as described in this thread. I overfilled the gas tank just before the leak started. Could that have caused the issue? It takes more than an hour or two after riding before it starts leaking.

    Question: do you have to completely disassemble the carbs to get to the float issue?

    I just got the bike a couple of months ago. The carbs were supposed to have been cleaned just before I bought it. It runs "OK", a little rough but it starts right up and idle's OK. It was already scheduled to go to a mechanic this week for a work over. He did a 15 minute inspection a couple of weeks ago and didn't think the carbs needed a complete rebuild/cleaning but only an adjustment. I'm wondering if that plan is now changed from adjustment to complete cleaning/rebuild.

    Final question: can I ride the bike before it goes to the shop? I rode it yesterday and it ran OK.
     
  12. Ltdave

    Ltdave Member

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    for clarification, can you get spitting gas from just a stuck float and not a petcock issue?

    ive got that some on my first out for the year, 900rk...

    riding it around the neighborhood it is starting to spit gas but i dont have any leak or 'overflow' when the bike is off...
     
  13. OldBikerDude

    OldBikerDude Member

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    Then you probably just have a float problem.
    Fitz is dead on, if you have a fuel leak with the motor not running then the petcock has issues but if it is only a problem when it is running then chances are it is the floats.
    You might as well check the valves, set your sync and colortune as well after you get your fuel issue resolved.
    If you are going to do something, do it right the first time. :)
     
  14. Ltdave

    Ltdave Member

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    Valves were all checked and spec'd less than 1,000 miles ago...

    Carbs were all gone through as well but i let it sit without prepping it to avoid gumming...
     
  15. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    If the floats used to work fine, then gummed up from a little non-use, you could ride the bike, carry a small rubber mallet and tap on the carb rack to stop the overflow. Let the fresh gasoline and engine vibrations go to work and fix the problem.
     

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