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  1. #1

    Join Date
    Jun 2008

    Polaris SLT 780 misses at low speed


    I have a problem that I can't quite figure out. I rebuilt the carbs on my 97 SLT 780 and I have a miss at low speed, but when the high speed jets open up, it runs like a dream.

    It is also hard to start when hot, which was never a problem before. I have to pump the throttle while riding the starter and it finally kicks over. It starts right up when it is cold. It sounds like it may be flooding, but I set the low speed and high speed jet exactly the same. I have dialed down the low speed settings 1/8 at a time, but it does not seem to make any difference. Is this a pop off problem and how do I figure out which one or ones are set wrong? Thanks for any advice.

  2. #2
    BBCaprice's Avatar
    Join Date
    Apr 2007
    Titusville FL
    Put the screws at stock settings and go from there. If its blubbering at lo speed you maybe to rich. (even stall). READ PREVIOUS POSTS!!!

  3. #3

    Join Date
    Jun 2008
    Well, I put the low speed screws back to stock setting, and then moved in at 1/8 turn at a time. It did not seem to make any difference to the low to mid range throttle setting. The miss seemed to stay the same.

  4. #4
    Click avatar for tech links/info K447's Avatar
    Join Date
    Jul 2007
    near Toronto, Canada
    Perhaps the spark plug wires need to be trimmed at the plug ends. Sometimes the wire ends get frayed inside, and don't make good contact.

    Cut 1/4" from each wire, and re-attach.
    There are other threads detailing how to do this.

    If this fixes the miss, you might discover more power right across the RPM range!

  5. #5
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Cleveland OH
    Are ther carbs dripping fuel when you look into them while running?
    Maybe the needle isn't seating...

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