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  1. #1
    ROTAX RACING performance
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    sound improvment (louder) on RXP ?

    whats the best mods to make the RXP a bit louder ( more agressiv sound )


  2. #2
    Site Admin Green Hulk's Avatar
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    the easiest way is to remove the plastic resonator and install a free flow pipe. I had my local muffler shop cut me a piece of 2 1/2" stainless steel pipe 8 inches long and roll the edges.

    Removing the resonator makes for a deeper more aggressive tone. If you want to take it a step further doing the waterbox mod as shown on my site really improves the sound of the ski as well as add's about 4 more horsepower.

  3. #3
    Site Admin MikeTrin's Avatar
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  4. #4
    ROTAX RACING performance
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    thanks, i still have a GPR1300 stage II, but i will get an RXP soon

  5. #5
    rx4pain's Avatar
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    The rain has settled in for the weekend here in the NW, so perhaps I should yank the ski from the water and get to these mods.

    Hulk, is the waterbox mod as easy as it looks? How difficult to get that exhaust pipe disconnected? Threaded? I haven't really looked at it.

  6. #6
    Site Admin Green Hulk's Avatar
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    The waterbox mod is very easy. A sawzall makes short work of it.
    the waterbox is also very easy to remove from the ski. Take the exhaust coupler clamp off, emove the other hoses, unhook the strap and it comes right out.

  7. #7
    North Carolina Hoovermaneuver's Avatar
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    The red print is hard if not impossible to read

  8. #8
    North Carolina Hoovermaneuver's Avatar
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    can't read step 5 at all

  9. #9
    Site Admin Green Hulk's Avatar
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    i know it is and i apologize for it. If you go to the main site the images are clickable and once they are bigger they are easier to read.... just gotta squint a little

  10. #10
    Site Admin Green Hulk's Avatar
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    by the way, step 5 says cut down exhaust pipe neck 1 3/4 inches

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