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Thread: Carb Question

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    rlharrison60's Avatar
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    Carb Question

    Does anyone know what size jets are suppose to be in Keihin carbs on a 1050? My main jet is 150 it looks like, pilot jet is 08 and mid range jet is 09. Engine is ported. Are these the right jets for it? Engine is cutting out at 6400 rpms, since I installed V- Force reeds.


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    AWA Member 32DegH2O's Avatar
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    What year and model did the carbs come on?...need to know as they changed carb sizes during the 1050 years. Not sure where you are getting the numbers for your pilot and mids...there are no numbers like that for Keihin jets. You can go to this link and look the carb info up on the year and model watercraft.

    http://parts.polarisind.com/Browse/Browse.asp

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    rlharrison60's Avatar
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    It is a 97 Sl. Thats the numbers I got off the jets I took out. I may have read the pilot and mid jet wrong tho. Could of been upside down. Going to recheck them when I get home.

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    Tony's Avatar
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    Quote Originally Posted by rlharrison60 View Post
    Could of been upside down.
    That would be my guess.

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    rlharrison60's Avatar
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    Ok, Im not schooled on carbs. The main jet is a 150, Pilot jet is a 80 and mid-range jet is a 60. Found the jets in the manual, and it shows the main jet to be a 158, pilot is 75 and center, I guess thats the mid range to be a 152. Should that be right? And does anyone have these jets they can sell me?

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    120 doesnt sound right either

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    rlharrison60's Avatar
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    Quote Originally Posted by 97sltx1050 View Post
    120 doesnt sound right either
    Where did you get 120 from?

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    Tony's Avatar
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    Quote Originally Posted by rlharrison60 View Post
    and center, I guess thats the mid range to be a 152.
    I think it might mean center cylinder has a 152 high. If your running 150-152's with the VF reeds and the manual calls for 158's that might be at least part of the problem
    Last edited by Tony; 07-15-2008 at 06:28 PM.

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    The 97 SL1050 came with 40mm carbs with out an accelerator pump on the mag cylinder.These carbs only used 2 jets (high and low) no mid jets.

    If you have mid jets,you probably have an accel pump.I would say they are later model carbs and probably jetted to the engine/engine work.Sorta like a custom jetting,stock #'s don't apply.

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    rlharrison60's Avatar
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    Quote Originally Posted by casey67 View Post
    The 97 SL1050 came with 40mm carbs with out an accelerator pump on the mag cylinder.These carbs only used 2 jets (high and low) no mid jets.

    If you have mid jets,you probably have an accel pump.I would say they are later model carbs and probably jetted to the engine/engine work.Sorta like a custom jetting,stock #'s don't apply.
    Yes it does have an accel pump. Im going to pull the other jets and see whats in them. Can someone tell me what size jets I need? This ski is becoming a pain in the assh.

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