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  1. #1
    absentx's Avatar
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    SLX 1050 throttle response problem revisited, with video

    Okay, so we will be back at the 785 next weekend, so I decided I would take today to drop my other skis in the water and fire em up for the first time this year.

    Basically I have had a never ending problem with my 99 1050. You cant gun it from idle and get it to go. Probably 70% of the time it falls flat on its face and kills.

    I have spoke with Randy about the problem a lot, and at the end of last season he sent me three new pilot jets. So last night I finally put them in, replacing the stock 65's with the new 70's. I was hoping this would cure the problem, but it didnt. It doesnt even seem like the jets changed a thing. I can just tell its acting the exact same way it always has.

    So anyways, I made a video so people can watch it and listen to the engine and offer up any suggestions.

    We have already tried many things, including proper flame arrestor adapters(like lako stacks) and adjusting the idle screws and idle speeds until we are blue in the face.

    In the video I pulled the seat open so you could hear the engine better, I know this might have some affect, but it did the exact same thing, so it shouldnt matter. Pulling plugs after this situation reveals them to be bone dry. Bigger jets didnt seem to help...whats next?

    Here is the video:



    Air leak is possible, but the damn thing runs like a bat out of hell and i think it would of blown by now if there was a bad leak.

    accel pumps work fine

    75 original hours
    92 octane domes
    Vforce reeds
    Jetworks valve
    Skat impeller (suggested stock application)
    Last edited by absentx; 05-04-2007 at 07:08 PM.


  2. #2
    Moderator beerdart's Avatar
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    How are the reeds??

  3. #3
    absentx's Avatar
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    Vforce 2's that were brand new at the beginning of last season. maybe 20 hours on them...not even that.

    problem has existed before and after installation of reeds.

  4. #4
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    Welcome to my world.

    I thought it was the SBTurd engine.

  5. #5
    absentx's Avatar
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    I almost want to just try different carburetors.

    My Dad's SL900 with the 38 keihins or whatever they are has the smoothest acceleration I have ever seen.

  6. #6
    ph2ocraft's Avatar
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    Install a fuel pressure gauge at the return line and see if it drops to zero.
    If it does, start looking for your restriction.
    Have you changed the fuel lines yet?
    Have you verified the needle/seat combination is correct? Maybe somebody repaired them ans installed the wromg ones?
    How many of the clear flapper things are on the jet block?
    What happens when you try it with the choke partially engaged?

  7. #7
    absentx's Avatar
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    Randy went through the carbs last year.

    Choke partially engaged helps the situation.

    Have not changed fuel lines, but all of them are in visibly good shape.

    I will try the fuel pressure guage...where can I get one?

  8. #8
    ph2ocraft's Avatar
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    How are the lines that leave the sender unit?
    Do they fold over and make a tight turn? That's a usual ugly restriction.

  9. #9

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    no it shouldnt be doing that we should start useing videos 2 diagnose vehilces instead of people saying well it just dies when you hit the thorttle ,

    seems 2 me you have an incorrect jet , dirty jet , or outta wack tune job on it ,

    how do the spark plugs look , piston wash ?

  10. #10
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    carbs

    no acclerator pump,notice how the ski doesn't even try to rev when the throttles hit,i bet if you continously slowly ease into it it will pickup rpm.there is a check ball inside the accl pump housing that prevents fuel from flowing backwards when the pumpdia moves

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