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  1. #1
    waveblasterlynch's Avatar
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    jims mod plate and worx grate question....

    ive currently have a 2007 gp1300r

    stock except for a jims mod plate.....

    I have two washers on the plate nearest the engine. I also have a washer on each of the bolts for the tabs. The ski runs nice and steady.

    I have now bough a worx scoup grate and pump seal kit for my ski.

    The question i have is.... can i remove the two washers from the plate after fitting the scoup and seal kit as i read on another forum these washers will cost me approxmitly 1mph?

    Cheers
    David


  2. #2
    waveblasterlynch's Avatar
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    Anyone?

  3. #3
    Prism's Avatar
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    Usually the higher the plate angle the higher the speed (to a point). My Jims FF plate was fastest with NO shims or washers under the rear and the front as close to flush as possible without the angled sides hanging lower than the hull. (Use a straight edge) To get it that high, the reduction nozzle and pump need to be ground with a grinder for clearance. Lay a piece of paper between the pump and the plate, then bolt the plate up and pull the paper out. If the paper isn't stuck and comes out unripped, you've ground enough off. I ended up taking another 10 thousandths off the rear mounts on my FF plate in search of more speed. By the time I got done shimming and testing I was back near the original plate height set by Jim (.980 on my ski) so cudos to him! Get close to flush on the angled sides in the front and no shim in the back and you should be really close to optimum. Also step your sponsons.

  4. #4
    waveblasterlynch's Avatar
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    Thanks prism.... ive that EXACT setup done now.... just waiting for the chance to put it in the water. Thanks buddy

  5. #5
    Prism's Avatar
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    If it bounces a little at top speed, add two .030" thick washers between each of the trim tab mounting points and the hull. This will help stabilize the bounce allowing the ski to reach a higher speed. Any hull motion except straight ahead will scrub speed on glass water. The fastest from my experience is just to the point where its on the verge of bouncing.

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