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  1. #1

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    Unhappy Stx-12f reving problems

    Hello all have a 2004 stx-12f that seems to not rev very good. When getting started it seems to take alot to get it up on plane. Once going it only revs to 5500 to 6000 rpms. Talk to Kawasaki and seems it should make its peek horse power at 7200 rpms. If i remove the seat and let it breath it hits the rev limiter when taking off. Looked over all breathers into the hull and nothing is plugged up. Is this a common Problem? Any info on this machine would be great?


  2. #2
    xxx2's Avatar
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    Oct 2006
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    I would check compression first and foremost, she is 10 years old..how many hours are on her?

  3. #3
    Pain is fear leaving your body.... rlovebk's Avatar
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    Sounds like you may have an exhaust leak based on running well with the seat off.

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  5. #4
    xxx2's Avatar
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    If it runs good with the seat off definitely exhaust leak. If it only pulls 6k rpms with seat off make sure your engine is up to par. When was the last time it ran correctly?

  6. #5
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Check the thread in my signature then post back.

    Sean

  7. #6

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    Jun 2013
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    Thanks guys pulled the seat off this morning and ran it found silicone rubber piece has a hole is the bottom side of it. I am fixing this ski for a friend, First Kawasaki I've ever fixed. It only has 45hours on it. I will order the part on Monday. Thanks for the help.

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