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  1. #1

    Angry Kawasaki ultra 250x boost issue... Need help!

    I posted a thread over the summer for my issue and tried different things but nothing working. Ever since I put my ski in for this past season I have been having an issue maintaining full boost. The ski would hit full boost and top speed but after about a minute at full speed the ski would start sputtering and I would notice the boost drop to around 6psi. This would happen every time under full acceleration. I thought plugs at first and fuel but I don't believe that to be the issue. My intercooler is fine, no water lines loose or detached, etc... . The belt seemed to be putting out a lot of grime over the past two years and the ski has about 100hrs so I decided to change it in hopes of that resolving the issue. After changing the belt, everything seemed to be great, full speed, full boost, etc... . After about a half an hour of riding the ski began sputtering and boost was dropping again. I tightened the belt a little more and the ski again ran perfect for about 5 minutes and then began sputtering again. I don't know what else to do, the ski was great for 4 years now I'm ready to junk the damn thing. The ski was fine when winterized before this past season so I don't know what happened while winterized. All I did was put in new plugs and dropped in water.


  2. #2
    devils ride 250's Avatar
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    Did u use a gauge when checking the tension? Did u look inside the intercooler?

  3. #3
    nicjak's Avatar
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    have the paddles started to peel?

  4. #4
    Do you really need a gauge to tell how tight the belt is? I've always done it by feel

  5. #5
    Fat Man, Little Boat Region8Ultra250X's Avatar
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    Quote Originally Posted by marvin willis View Post
    Do you really need a gauge to tell how tight the belt is? I've always done it by feel
    YES

  6. #6
    good tool to have, can't be accused of guessing.

  7. #7
    what do you mean by paddles? and I did not use a gauge but I'm pretty sure i have it tight enough. At the longest stretch of the belt I have to really use full strength to be able to twist it 90 degrees

  8. #8
    I did not use a gauge. I'm pretty sure I have it tight enough. At the longest stretch, i really have to use full strength to twist it 90 degrees. One thing I have noticed is that the new belt seems to be putting out a black grime.

  9. #9
    nicjak's Avatar
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    Keep guessing then maybe its too tight maybe it isn't. .

  10. #10
    Where do you get the gauge? Do I have to get it from Kawasaki or is there a cheaper aftermarket tool?

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