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  1. #1
    Rex's Avatar
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    2000 RX Rejetting

    Hey Guys and Gals,

    I just picked up a 00 RX that has an aftermarket intake. I have been doing some reading and noticed its best practice to rejet the ski after you have replaced the intake. How can I check if my ski has been rejetted? The ski has a new motor and seems to be running good but I have been going over it and repairing some things that were overlooked with the previous owners overhaul. (Old lines, poorly routed lines, etc)

    Im new to jet skis and also 2 stroke motors so just want to make sure everything is running properly.


  2. #2
    AndinoWatercraft's Avatar
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    Welcome to the forum.

    You will need to remove the carbs and open them to see what size are the jets.

  3. #3

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    You need to rejet when the stock air box is replaced with open flame arrestors. What brand or intake does it have? Is this a carb'ed model or a DI?

  4. #4
    Rex's Avatar
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    Quote Originally Posted by Seadoo timebomb View Post
    You need to rejet when the stock air box is replaced with open flame arrestors. What brand or intake does it have? Is this a carb'ed model or a DI?
    Its a carbed Rx. I will check on the brand when I get home but I know it is a dual filter with a purple metal housing. The filter is a single piece and covers both carbs.

  5. #5
    SURFnTURF's Avatar
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    That is the R&D Air Filter.
    It works well but harder to remove if in a hurry than single cone type filters.

    I use highs 167.5 jets with adjusters closed
    lows i use 87.5 with adjusters open 1.5 turns
    stock N/S with Black spring 80 (gram) to give you a pop off at 20-21psi.
    This is with accelerator pumps working
    Accelerator Pumps not working 95 lows adjusters open 1.5 turns every thing else the same

  6. #6
    Quote Originally Posted by SURFnTURF View Post
    That is the R&D Air Filter.
    It works well but harder to remove if in a hurry than single cone type filters.

    I use highs 167.5 jets with adjusters closed
    lows i use 87.5 with adjusters open 1.5 turns
    stock N/S with Black spring 80 (gram) to give you a pop off at 20-21psi.
    This is with accelerator pumps working
    Accelerator Pumps not working 95 lows adjusters open 1.5 turns every thing else the same
    Are you running choke plates with this set up? And a stock cylinder bore? I'm trying to get my set up going. Ski came with the same filter. But the last owner never changed the jets. I thought the Pop off would need to be lower then stock?

  7. #7
    SURFnTURF's Avatar
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    Yes I always run the plates,yes stock bore but this wont change even if you have 1.5mm oversize.
    Pop off needs to be 19-21psi.
    Where everyone makes their mistakes is when after checking the pop off pressure they lay the PO tester down and reassemble the metal covers over the diaphrams and think they are done.

    That is when you want to pump about 15-20 psi into the carb and see if it leaks off. If it does, that diaphram is leaning on that lever cracking open the needle valves.
    The motor will not accellerate and it will run very rich, if at all.

  8. #8
    The last owner removed the choke's and installed a primer set up. And my accelerator pump is not working. So I was just going to jet it without. Do you think I need to go bigger on the jet's if I don't have the choke plates in the way? My set up is below.

    1998 GSXL
    Bored .75 over
    No Choke plates
    No accelerator pump
    R&D filter
    Running Premix.

  9. #9

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    I always ran the same jetting with plates removed. Worst case is opening up the jets more. The above jetting is a rich in my opinion. Unless the ports have been radically altered, you might find the ski running sluggish with that jetting. Also depends on how bad the gas in your area is too.

    When a primer setup is installed, the accelerator pump is usually removed or made inoperable.

  10. #10
    Seadoo timebomb, What do you think my carb set up should be?


    Also sorry for hijacking this thread Rex...

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