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  1. #1

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    Intake Grate and ride plate - now im slower!!! HELP!!!

    2007 GP1300R - 13 hours and runs great. Stepped sponsons and 64.9 on the GPS. Added a shim/pump plug kit, intake grate, and ride plate. All by R&D. now 64.0 on the GPS same conditions and same fuel level. Boat seems like it doesnt't have that tiny bit of last kick at the top end. Im thinking plate should of given me at least 1 MPH and the intake grate jsut isnt giving the pump enough water. So im going to take the grate off and put the stock one back on. Any ideas?


  2. #2
    mrbtd's Avatar
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    The grate is going to slow you down but its safer....For the plate you might check on getting it angled you can pickup as much as 4 mph

  3. #3
    WATER WOODY's Avatar
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    Did you grind the pump plugs down flush when you installed them? The plugs should fit flush with the pump shoe.If you shoe is hanging down,there will be speed loss.

  4. #4

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    Quote Originally Posted by WATER WOODY View Post
    Did you grind the pump plugs down flush when you installed them? The plugs should fit flush with the pump shoe.If you shoe is hanging down,there will be speed loss.
    I put all the plugs in and then took a straight razor and made everything perfectly flat. then installed the shims that come with the kit. It all looked good.

    Why is the grate safer?

  5. #5

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    Quote Originally Posted by mrbtd View Post
    The grate is going to slow you down but its safer....For the plate you might check on getting it angled you can pickup as much as 4 mph

    What do you mean get it angled? Ill post a picture of how it looks later.

  6. #6
    Crash Test Dummy Smitty's Avatar
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    Quote Originally Posted by jcorallo View Post
    Why is the grate safer?
    When you start making the GPR go faster, it has been known to take a sudden turn with deceleration if you have the stock grate; seems to come into play when you start getting faster than 68mph or so. Doesn't happen much, but when it does, you and the ski will separate right before you and the water become one with each other. You can get seriously hurt when it happens.

  7. #7

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    Some Pictures.

    The pump, even with the R&D shims is flush or recesed a little compared to the boat so Im sure that if fine. They tell you to have the ride plate as close to the boat as you can so you can see how the plate sits higher. Normal?
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  8. #8
    philip_gpr's Avatar
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    ignore the instructions

    remove the shims for the shoe

    then get the front of the plate so that it is almost flush with the shoe - maybe get the plate .020 in higher than the shoe - measure this at the sides
    Last edited by philip_gpr; 07-08-2007 at 07:44 PM.

  9. #9

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    Quote Originally Posted by philip_gpr View Post
    ignore the instructions

    remove the shims for the shoe

    then get the front of the plate so that it is almost flush with the shoe - maybe get the plate .020 in higher than the shoe - measure this at the sides
    Really? What is the point of the shims then? Do I just use metal washers to drop the ride plate?

    Are the Riva and Pro-tec plates better then this R&D? So far I have had to grind the pump like it says and now shim it to drop it down.

  10. #10
    philip_gpr's Avatar
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    Really? - yes or simply leave it like it is and go slow

    the R&D plate is fine, just needs a little TLC to get things right

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