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  1. #1

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    warning 75+ RXPX buck issues

    If you are approaching the 77mph speed you may want to consider putting holes in the tunnel.
    After getting pitched at over 75mph and hearing of others.
    Just because you ride around for a day or two don't mean it won't sneak up and buck especially on deceleration.
    I was standing up running wide open on flat water and let off the throttle, I got slammed on the hood then pitched.
    This warning is so others don't have to feel this pain.


  2. #2
    beachbum0286's Avatar
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    Quote Originally Posted by rxpstan View Post
    If you are approaching the 77mph speed you may want to consider putting holes in the tunnel.
    After getting pitched at over 75mph and hearing of others.
    Just because you ride around for a day or two don't mean it won't sneak up and buck especially on deceleration.
    I was standing up running wide open on flat water and let off the throttle, I got slammed on the hood then pitched.
    This warning is so others don't have to feel this pain.
    Stan, so did you do 81 at mud bug with no holes drilled on an X?

  3. #3
    Site Admin Green Hulk's Avatar
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    Drill the holes guys! PLEASE!

    Drilling the holes has absolutely no adverse reaction to the way your ski will perform.

    Stan, glad you are okay. I bet that was one hell of a scare

  4. #4

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    Ran 80 at the bug with one hole.

  5. #5
    Enufpwr's Avatar
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    Quote Originally Posted by Green Hulk View Post
    Drill the holes guys! PLEASE!

    Drilling the holes has absolutely no adverse reaction to the way your ski will perform.

    Stan, glad you are okay. I bet that was one hell of a scare

    Glad your okay,

    Drilled both holes and gained .4 on the gps consistantly. (THANKS)

    Not only did this help prevent an overstuff issue I gained slightly in speed which I wasn't expecting.

  6. #6
    Hydrotoys's Avatar
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    You guys REALLY need to put a pressure gauge on these pumps and get some baseline numbers... this guesswork is not the way to go about this.

  7. #7
    Water4fire's Avatar
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    Drilling the holes doesn't always prevent it.
    I assure you it doesn't.

    Be safe and drill the holes and then do the next thing that comes out
    Riva, or who ever.

    I used to think just a grate would solve it... UHHH NOT!


    .

  8. #8
    JSR Brad Clarke's Avatar
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    Jerry have you drilled an x yet or just rxp's as we did ours before doing the last turbo runs in the low 80's and it cavitated real bad off the start and if taking off slowly the ski will start to plane then rev and go nowhere.
    I was wondering if the problem is with the shoe being different from the x to the rxp and we have created an air passage to the rear smoewhere internally, we are yet to pull the pump again and have a good look but will do so shortly and if we see a passage will block it up and leave the holes drilled. We ran the [email protected] grate.

  9. #9

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    I got bucked [email protected] 77mph against the current and wind... Made a mistake....raised the ride plate. I"ve gotten warning bucks before but could hold on....

    The attitude of the ski plays a big role in this condition, was running all over the 6's for two weeks and wanted the bigger #

  10. #10

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    Brad,

    I had the same condition as you with; R&D grate and pump shoe drilled. I ended up resealing the pump shoe to the ride plate (as some sealant was missing), and filling the pump shoe holes.

    The cavitation went away completely. I then drilled 2-1/4" holes back into the pump shoe.

    Ive experienced no cavitation since.

    I think the air leaks in the pump shoe were always there, but in combination with the R&D grate and drilled holes, caused the exreme cavitation I experienced.

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