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  1. #1

    Polaris SLT780 issues

    HI guys new to the forum here. Thought Id join and get some help. Im having a little bit of a problem coming across the parts numbers for the spark plug boots as well as the plug wires. My Slt780 has been acting up lately. The boots seem to be cracking and not connecting to the top of the spark plug not allowing a good connection. SLT seems to be sluggish at best used to get right up and go from a dead sop now its taking around 15 seconds to get up on a plain. Iv replaced the actual plug hopping that might be the problem but it wasn't. Also quick question around 4500 Rpm something kicks in and seems to launch the ski from about 40 to 55MPH like it nothing when its running good any idea whats causing this?


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    https://www.denniskirk.com/ngk/tb05e...prd/200120.sku

    The wires cannot be replaced easily. they are glued in. What you do is cut the wires back about 1/4" to expose clean wire and then rescrew the plug boot back on. That should take care of your issue.

    What you are experiencing is the 2 stroke motors' "power band". Or what we call getting on the pipe. It's a point where the exhaust flow actually starts to help engine output and really kicks in. It's normal.

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  4. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    On some CDI isn't there also a big jump in the spark advance curve that contributes to that power surge as RPM rises?

  5. #4
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    You may very well be correct about that.... I just add it "getting on the pipe"

  6. #5

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    May be time to rebuild the carb and fuel system.

  7. #6
    The motors pretty much brand new the guy i bought it from had to replace the whole thing about 2 months before i got it. I guess the water pump went out and it sank or got water in the motor and ruined it. Put a brand new motor in only has 50hours on it. I think I'm gonna go ahead and try replacing the boots on the plugs for shits in giggles see if that gets me anywhere first.

  8. #7
    BlueFishCrisis's Avatar
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    Water in the motor doesn't mean new fuel system. Depending on what a "brand new motor" is defined as, it may or may not have come with brand new carbs as well.......

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