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Thread: Carb question

  1. #1

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    Carb question

    I have a set of carbs and triple outlet pump out of a 96 SL780 that are in nice shape, can I go through them, rebuild the pump and install them on my 94 SLT750? It runs fine now but I've been reading and want to do the upgrade. It would be easier this way as the fuel rail is already set up for the 3 outlet pump. Thanks


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    Moderator beerdart's Avatar
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    Yes you can.

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    Great thanks! They should be set up to the 750 settings per the manual right?

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    la90043's Avatar
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    The carbs are the same. But i am pretty sure that the jets are of different sizes and also the pop off pressure is different too.

    But of course check it out. Im known not to be right 50% of the time.............he he he.

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    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by JMF1 View Post
    Great thanks! They should be set up to the 750 settings per the manual right?
    Yes sir.

    Swap jets from the 750 to the 780 carbs, then set your adj screws accordingly.

    Also swap the springs from the 750 to the 780, that'll keep your pop off pressure the same.

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    What springs should I swap? What is pop-off pressure?

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    stubburnjdh's Avatar
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    The springs that are under the lever that pushes your needle to seat it.
    Pop off is the amount of pressure it takes to push that needle open against the spring you will be swapping. The wrong pop off pressure can make you run lean or rich.

  8. #8

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    Quote Originally Posted by stubburnjdh View Post
    The springs that are under the lever that pushes your needle to seat it.
    Pop off is the amount of pressure it takes to push that needle open against the spring you will be swapping. The wrong pop off pressure can make you run lean or rich.
    Got it, now I was reading in the how to forum about the fuel return line restrictor, someone mentioned that the 780 carbs had one built into the last carb nipple. Do I then eliminate the restrictor in my return line and just use the one in the nipple?

  9. #9
    Moderator beerdart's Avatar
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    Quote Originally Posted by JMF1 View Post
    Got it, now I was reading in the how to forum about the fuel return line restrictor, someone mentioned that the 780 carbs had one built into the last carb nipple. Do I then eliminate the restrictor in my return line and just use the one in the nipple?
    Yep as long as you have the restrictor in the nipple.

  10. #10

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    What size is the hole in the restrictor? Boy, I'd hate to be without that!

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