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  1. #1

    rejetting gsx carbs

    hi
    I have a seadoo gsx limited -98 951cc. bought 89mm wiseco pistons, and drill up the cylinders, prox airfilter, r&d 43cc cylinderheads, carbontech reedvalves. Removed oil pump. what I wonder is if anyone knows what jets i need in my carburetors?

    85 low ?
    167.5 hi ?
    2,3 needle?
    stock spring?
    popoff pressure ??

    grateful for the response
    reg. conny in sweden


  2. #2
    96XPSS's Avatar
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    I would try 90 pilots, as 85 is still a little lean. If the engine takes awhile to settle down from a rev, it is lean on the pilots. And 165 mains. This is for tuning in Georgia, USA.

    Welcome to the forum, and let us know how she runs!

  3. #3

    yers of my gsx?

    another problem. I am looking for an impeller. 97.5 is not the same as at 98th how do you know the difference between model years. it says 98 on the hull, but 97 on the engine.

  4. #4

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    n.j.
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    white motor=97.5 silver motor=98&up
    98 had larger pump.

  5. #5

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    if the top deck of your hull is grey, then its a 97.5 even though the H.I.N may say 98

  6. #6
    GTXX's Avatar
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    Quote Originally Posted by sund View Post
    hi
    I have a seadoo gsx limited -98 951cc. bought 89mm wiseco pistons, and drill up the cylinders, prox airfilter, r&d 43cc cylinderheads, carbontech reedvalves. Removed oil pump. what I wonder is if anyone knows what jets i need in my carburetors?

    85 low ?
    167.5 hi ?
    2,3 needle?
    stock spring?
    popoff pressure ??

    grateful for the response
    reg. conny in sweden
    I ran that exact jetting and needle/seat for years with good success but it is a lot colder there so you may very well need larger than 85's. the problem I see is that you will need very high octane fuel with the 43cc head.

  7. #7
    KrunchovXPL-GTX-RX's Avatar
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    Quote Originally Posted by GTXX View Post
    I ran that exact jetting and needle/seat for years with good success but it is a lot colder there so you may very well need larger than 85's. the problem I see is that you will need very high octane fuel with the 43cc head.
    +1

    That is a LOT of compression.

  8. #8
    ok, maybe I bought the wrong cylinder head. but it's easy to turner of a bit. thanks for all fast answer. I have a 98th Silver engine. just to get a new better impeller then. any suggestions?

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