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  1. #1

    Join Date
    Aug 2009
    Location
    San Diego, CA
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    71

    Ride plate shimming

    I've read a few posts on shimming the ride plate to help stop porpoising. I tried two and three washers between the hull and plate at the 2 rear bolts of the stock plate and I'm still jumping out of the water. I'm in San Diego and both San Diego Bay and Mission Bay where I ride have mild choppy waters on average. That alone doesn't help me.
    Just waiting on an R&D extended plate to arrive, but I am wondering if I still need to shim it when considering the waters I ride in. If I do is there a minimum or maximum range in degrees that is recomended? I say "dergees" because there are alot washers with different thickness. I've read anywhere from 2-4 washers but nobody is specifying washer thickness.


  2. #2

    Join Date
    Nov 2009
    Location
    NC
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    783
    +1
    29
    What ski?

  3. #3
    Gus13letter's Avatar
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    Apr 2008
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    Tampa Bay, FL
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    Quote Originally Posted by toyterrific View Post
    What ski?
    +1
    On my GPR I have the R&D FF Plate and ride with no shims in it. The thing that benefit me the most was the R&D Extended steering nozzle and shimming the trim tabs not the plate. Knowing what ski you have would be helpful.

  4. #4

    Join Date
    Aug 2009
    Location
    San Diego, CA
    Posts
    71
    Sorry about that. It's a '99 GP760.

  5. #5

    Join Date
    Nov 2009
    Location
    NC
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    Ah yes, the GP760.
    You need an old "Ocean Pro" ride plate. I lucked out and found one here on the Hulk.
    Don't think shimming the factory plate will help you that much. Might want to try the R & D plate.
    Oh,adjust your sponsons all the way down as well.

  6. #6
    Prism's Avatar
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    May 2007
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    "New" Jersey
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    826
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    99
    +1 on the sponsons all the way down. Cheap and easy improvement.

  7. #7
    gaviski's Avatar
    Join Date
    Oct 2010
    Location
    Port Richey, FL
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    133
    I heard setting the trim to noise down or neutral helps. Is there any truth to this?

  8. #8

    Join Date
    Aug 2009
    Location
    San Diego, CA
    Posts
    71
    Picked up the ride plate at my parents house. I forgot I had it sent there cuz they're always there to sign for deliveries. Well just finished installing it with two stainless fender washers at the rear. I took a few measurements with an angle finder and each washer stacked on the plate was about 1 degree per washer. When I added a third washer the angle jumped to 3.5 degrees. Weird. Also, I don't have trim tabs.

  9. #9
    gaviski's Avatar
    Join Date
    Oct 2010
    Location
    Port Richey, FL
    Posts
    133
    Let us know how the new ride plate helps. I was thinking about getting one as well.

  10. #10

    Join Date
    Aug 2009
    Location
    San Diego, CA
    Posts
    71
    Had to take out the XL1200 today so I could keep up with my 4-stroke buddies. Hopefully I'll get a chance next weekend and take out the GP760 to test the ride plate.

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