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  1. #1

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    04 waterbox vs 01 waterbox

    What is the reason for the addition of a box sized chamber welded to the side of my 04 1300r waterbox ? I noticed today that its not round like my 01 1200r . It made changing the trim cable a royal pain


  2. #2
    ABBOTT's Avatar
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    i am thinking it's because of the backpressure changes that were needed when yamaha increased the 1200R to the 1300R beginning in 2003.

  3. #3
    Pistonwash's Avatar
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    No, it was to keep water from going into the exhaust chamber and frying the catalytic converter. In addition it does increase back pressure and actually will give you some rpm's.

  4. #4
    ABBOTT's Avatar
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    SEE I TOLD YOU SO. Just kidding!

  5. #5
    Moderator RX951's Avatar
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    Has anyone tried a 1300 waterbox on a 1200 ?

  6. #6
    MR. SCOVILLE UNIT SUCKMYWAKE's Avatar
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    on my 00 efi ski, i run the 1200 waterbox with great results

  7. #7
    2000 GPRXP 4tec shooter98xpl's Avatar
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    what kind of results are you getting SMW?
    SHOOTER

  8. #8
    MR. SCOVILLE UNIT SUCKMYWAKE's Avatar
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    i really cant say for sure, but doesnt seem to cause any problems. with minimal mods this is a 72 mph ski. i'm going to be swapping props soon to get a more target rpm, and then after that, i will swap back in the 1300 waterbox for a back to back and post results

  9. #9
    Duke's Avatar
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    Didn't notice much difference on my boat other then the 1300 box is much more quite.

  10. #10
    Mr Bill's Avatar
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    Anyone tried a 1200 waterbox on a 1300?

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