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  1. #1

    Bending float arm when rejetting??

    The mechanic that is rejetting my 2000 Gp1200R stock carbs says that he will need to bend the float arm a little. Does this sound right??

    Rejetting specs are
    110, 125 and 1.5 NS and 95 gram spring


  2. #2
    krispaintballz's Avatar
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    He probably means the needle and seat arm. There is no "float" on a pwc carb. Bending the arms are typical beacuse they do get bent sometimes. What he is trying to do is to get the arm straight and level with the top of the carb. This is easily measured with a razor blade as a straight edge. I have done it many times. This one is too high, which will cause the diaphram to hold the needle open and continously dump fuel down the carbs. Makes tuning the low end impossible. Arms that are too low will cause the needle not to open or open too late. I have attached a picture showing the level of the bent arm with a razer blade.

    Here is a good read:
    http://www.greenhulk.net/forums/showthread.php?t=62751

    Info provided from Bill(Osidebill)
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  3. #3
    Yes, that is the arm he is refering to. So if it is not level then it will need to be bent, correct? How do you bend it exactly to level without going to far? is there a tool or something?

  4. #4
    Moderator OsideBill's Avatar
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    Put your finger on the needle side and hold down, press down with your other finger to bend a little then inspect. If you bend to much pull up on it to bring it back. this is very simple to do.

  5. #5
    Moderator DrewNJ's Avatar
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    also make sure that the horizontal pin holding the needle arm is fully seated. If it is not sitting flush in the slot even just a little bit it allows the needle arm to sit high. It's an easy thing to overlook

  6. #6
    Thanks for the clarification and the assistance!

  7. #7
    Moderator OsideBill's Avatar
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    Quote Originally Posted by DrewNJ View Post
    also make sure that the horizontal pin holding the needle arm is fully seated. If it is not sitting flush in the slot even just a little bit it allows the needle arm to sit high. It's an easy thing to overlook
    I have never seen this happen Here is how I do it.
    • Install the retainer screw a few turns into the threaded hole.
    • Insert the spring arm into the needle assembly.
    • Slide the pin of the spring arm assembly under the head of the retainer screw.
    • Place the spring under the arm into the detent.
    • Push down on the assembly to hold it in place in the slots.
    • Tighten the screw while holding the assembly in place.
    • Adjust the spring arm height.
    • Perform a pop-off test.

  8. #8
    Bill, to adjust the spring arm height, I push on the arm to bend a little... like stated in your previous reply, correct?

  9. #9
    Moderator OsideBill's Avatar
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    yep, it is very easy to bend.

  10. #10
    Moderator DrewNJ's Avatar
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    Quote Originally Posted by OsideBill View Post
    I have never seen this happen

    Must just be me and my big fat sausage fingers...

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