Question about 2003 Yamaha YZ 250 F

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Hi, my name is Victor and the problem with my yamaha is the floater ive been told. As soon as I turn the gas valve to on, the gasoline starts pouring out of one of the hoses at the bottom of the bike. I am on a pretty low budget and would like to know a step by step process on resolving this problem myself if possible.

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  • victoramonti May 23, 2011

    Thanks a million...
    I will most def try that...
    Ill keep you posted on how it comes along...

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OK mate to test this theory at least (if is the float causing problem) just remove carbi and some where you can cleanly work on the carbi with the petrol tank side by side. remove bowl off carbi and then with carbi in upright position connect to fuel source and turn it on.
Yes you will get fuel everywhere but quickly with you finger gently lift the float up to point where fuel stops assuming the fuel does stop then you have confirmed this area is working or not.
if fuel does not stop then remove the float (there is only a free sliding pin holding it in place) then remove the seat valve and check for damage to the seat or the little spring mechanism but more likely it will have dirt or gummed fuel stopping the seal
another thing there is a small allen bolt at the bottom of the carbi with a hose directly below it if you want to remove fuel from the bowl you just undo this little bolt and fuel rushes out of tube until all fuel is gone - this is great when you want to remove the fuel but I have seen these become loose over time and obviously they can leak when you don't want them too (Could be worth checking)

Posted on May 20, 2011

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