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  1. #1

    Help with 2000 Gp1200R stalling. idles fine, can't accelerate

    Please help, I have a 2000 GP1200R that Bill(Osidebill, god bless) rebuilt the carb on for me last year. Ran great all summer till late august, and now I am having an issue. The ski starts and idles fine. I can adjust idle screw and have no issues, but I can't accelerate. As soon as I do it stalls. If I pump accelerator several times it will pull for about 2 sec, and then stall out. I have done all the basics, new plugs, checked compression, and I am getting fuel. I checked with a compressor, but I almost feel like I am opening the carbs up and there is no air getting pulled in? Does this sound about right? Any ideas where I should start to check everything, and get this ski back on the water? Any help is greatly appreciated. Thanks again.


  2. #2
    Julian's Avatar
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    Yeah.. that sucks.

    -fresh fuel?
    -fuel flapper inside tank?
    -fuel filter?
    -reeds stuck?

  3. #3
    Quote Originally Posted by Julian View Post
    Yeah.. that sucks.

    -fresh fuel?
    -fuel flapper inside tank?
    -fuel filter?
    -reeds stuck?

    I have done the first 3. I dont really understand what reeds are and how to check them to see if they are stuck, can you point me in the right direction and explain how to correct this? Thanks

  4. #4
    Julian's Avatar
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    These are the flaps ( valves if you like ) between your carbs and your crankcase (sticky: reed function 101)
    They will let the air/fuel mixture in, but nothing out.
    Standard has 8 'flaps' per cylinder, but there are race models which have more.

    It's hard to check them when they are installed. if you remove the carbs, you can gently feel if all the flaps open and close properly.
    When you remove the sparks, you can listen to each valve while turning your crank, they 'breathe in' once every cycle.

    Reeds must be 100% and are crucial for proper engine performance.

    Good luck!

  5. #5
    Tommy Pantsdown's Avatar
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    Cat or D-plate? I'm assuming if the carbs are gone, it has a plate. Was the cat in tact when removed? I had a small piece of cat drive me nuts on my 03.

  6. #6
    Worked fine with dplate

  7. #7
    Julian's Avatar
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    Any updates on the reeds?

  8. #8
    Hey Julian,

    checked the reeds, seem fine. They all press fine, almost like a click, and then go right back in place. I felt 4 in each carb chamber, is that correct? Any other suggestions?

  9. #9
    Julian,

    as I suspected, I took the carbs apart, and they looked perfect, so I think I can rule them out. What else can I do at this point. It has to be something obvious, that I am just missing.?

  10. #10
    Julian's Avatar
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    Make 2 temp. fuel lines of 2m, and test with a jerrycan.

    Maybe shoot a lot of pics, and see whats in there.

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