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  1. #1
    SpeedFreak
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    shimming ride plate

    Looking from the back of my ski there is a gap between the pump shoe and ride plate. I know your supposed to have a gap between them from front to back, but is there supposed to be a gap up and down? I'll get a pic later if it helps.


  2. #2
    Nothin' runs like a Deere IowanGPR's Avatar
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    yes, that is what makes every boat different. testing different thickness of shims on the front will give you your best top speed. i haven't ever measured the drop in mine but it isn't a lot.

    i dont know if it will help much unless you have a modified plate or at least aftermarket

  3. #3
    Mike's GPR's Avatar
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    I reread your question like 5 times and I think I know what you are talking about.

    As you position the rideplate (I believe yours is still stock) have all 4 bolts loose, put pressure on the plate to move as close to the pump shoe as possible, and tighten. Make sure it is straight!!!

    As far as the gap, there will be a small gap between the plate and shoe. The "step" from the pump shoe to the ride plate should be almost flush (.020) step is your ideal pump shoe to plate transition. Use a steel ruler, run it across your shoe and to your ride plate and make sure it does not catch at all. MAKE SURE THAT YOUR RIDEPLATE IS NOT HANGING LOWER THAN YOUR PUMP SHOE!!!!!!

    With the stock plate I needed a couple washers on the front ride plate bolt holes to get this closer alignment. Almost gained .5mph with the stock plate setting it up this way.

    Don't waist your time with the stocker, just buy a used R&D plate and be done with it. And you will still use these same instructions for setting up your plate.

  4. #4
    SpeedFreak
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    thanks for the quick responses. I'll be sure to fix that. Should I just use stainless washers to shim it?

  5. #5

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    u should shim it down as close as possible to the shoe without hanging it below also make sure you r centered with the shoe mine has 3 shims in front and 2 in rear clearance from shoe to plate is .005 check this with straight edge along bottom of shoe

  6. #6
    Mike's GPR's Avatar
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    Quote Originally Posted by jprochnow View Post
    thanks for the quick responses. I'll be sure to fix that. Should I just use stainless washers to shim it?
    No problem, I only use stainless washers

  7. #7

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    hey mike is .005 too far down?

  8. #8
    Mike's GPR's Avatar
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    Not sure how you could measure that closely from the pump to the shoe. But as long as when you slide the straight edge from the shoe to the plate and have no areas that catch you are good to go.

    Check both sides and middle of the plate. These plates and shoes are not even close to true (flat)

  9. #9

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    measured with feeler guage thats @ center of plate sides alittle higher

  10. #10
    Mike's GPR's Avatar
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    Quote Originally Posted by gpr2000 View Post
    measured with feeler guage thats @ center of plate sides alittle higher
    Sounds like you got it. Good job, your a quick learner!

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