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Thread: Pocket bike fuelling?

  1. #1
    Join Date
    17th January 2005 - 12:14
    Bike
    2011 yz450f
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    Featherston
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    4,025

    Pocket bike fuelling?

    Does anyone have any carb issues in the fact the bike wont run like it is to lean past quarter throttle?
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  2. #2
    Join Date
    9th January 2008 - 12:01
    Bike
    Custom Ag100
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    The Tron
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    1,443
    Yep, adjusted float level i.e lifted up 3-4mm

  3. #3
    Join Date
    27th March 2007 - 11:29
    Bike
    1997 Yamaha TRX850
    Location
    Auckland
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    101

    Common problem

    This can be a very common problem on modified bikes..ie you have fitted a performance pipe, etc etc...

    There are jet kits available to allow more fuel intake.
    If the bike has been crashed or if the bike has been left for a while, a basic carb overhaul may be needed.

    Yes, check float level
    Check all your fuel lines ( no kinks or twists, check the fuel filter is flowing fuel (please tell me you are using a filter)
    Check your fuel tanks fuel downtube for any blockages (old plastic can block it up, you can run a similar sized drill bit down it to clean it out, even make it slightly larger)
    Clean out everything, use compressed air to free any blockages.
    If all else fails, just buy a new carb they are cheap enough.
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  4. #4
    Join Date
    5th February 2008 - 13:07
    Bike
    2006 Hyosung GT650R
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    BOP
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    7,141
    Warm the bike up properly, and then lift its arse off the ground and full throttle it. The bike will do one of a number of things;

    1.) Rev like fuck and scare you big time - go race it.

    2.) Four-stroke heavily and rev-limit - too rich on the main jet.

    3.) Rev well for about 10 seconds and then falter and quit - float level too low, fuel line blocked etc.

    Take care not drop its' rear wheel..

    Steve
    "I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
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    "What Steve said pretty much summed it up."
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  5. #5
    Join Date
    17th January 2005 - 12:14
    Bike
    2011 yz450f
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    Featherston
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    Cheers guys.

    I have now lifted the float height and it runs mint but leaks fuel like crazy so Im thinking of a new carb and starting over.

    Bike is bog standered I got it not going and am trying to get it so it runs right
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  6. #6
    Join Date
    5th February 2008 - 13:07
    Bike
    2006 Hyosung GT650R
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    Quote Originally Posted by Ivan View Post
    I have now lifted the float height and it runs mint but leaks fuel like crazy
    A new carb will be just the same. Lower the float level just a tad. It takes a bit of dicking around to get it right.

    Steve
    "I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
    "read what Steve says. He's right."
    "What Steve said pretty much summed it up."
    "I did axactly as you said and it worked...!!"
    "Wow, Great advise there DB."
    WTB: Hyosung bikes or going or not.

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