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  1. #1
    elviswongg's Avatar
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    Question water box mod (Extra hole inside)

    Hello

    Question about the water box mod (Extra hole inside) on 15F

    As the 2009 STX15X have just a single muffler( as the 2008 UltraX) is it recommand to do the exaust mod as per Riva Racing instruction free Flow Exaust (cutting the back and do the extra hole inside a get the cover weld) ?

    If i do this mod will this give a noticeable improvement i mean RPM, speed gain, better acceleration? Will the jetski sound louder after ?


    Thank you


  2. #2
    Racer kawasaki15f's Avatar
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    It will be louder. I did all my mods at the same time so I cant really say what the improvement was.

  3. #3
    robk's Avatar
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    Not worth the trouble in my case. I noticed nothing except more noise.

  4. #4
    Quote Originally Posted by robk View Post
    Not worth the trouble in my case. I noticed nothing except more noise.
    +1

    just like those rice burners on the highway with big bazooka muffler thinking they are going any faster with LOUD exhaust...

  5. #5

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    Quote Originally Posted by meangreenman View Post
    +1

    just like those rice burners on the highway with big bazooka muffler thinking they are going any faster with LOUD exhaust...
    Yeah mean.. we call them grape fruit shooters ... sounds like a bunch of pissed off bumble bees in a coke can ...

  6. #6
    elviswongg's Avatar
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    Ok I got the message , this mod doesnt worth it.

    thank you for you replies

    Really like this forum save a lot of troubles ans money to all the Jetski enthousiast.

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