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  1. #1

    Join Date
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    tested N8R's keel mod

    I have an 05 gpr I bought new, Fercho package and stuck at 74, 75 with a bad bounce. I have tried everything, the only setup that stops it is the taps shimmed 120 ths down but I loose speed. Tested the keel mod with no taps and full tank of fuel. WOW no bounce past 45 and no side to side. It runs so straight it takes alittle more to make it turn. Some of the bounce returned when I got down to 2 bars but maybe now I can put my FF plate back on and shim it for some more speed.
    I don't see any better hole shot but when I return home I found that the jetwork valve was bad and wide open.
    If you have the bounce ( Porpoising ) you need to try this thing it's great IMO
    Mike


  2. #2
    Moderator OsideBill's Avatar
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    Looks like some great results with this mod I have a couple here that Spud and I will putting through the wash in three weeks.

  3. #3
    One day at a time..... N8R's Avatar
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    Thumbs up

    Quote Originally Posted by mikel70 View Post
    I have an 05 gpr I bought new, Fercho package and stuck at 74, 75 with a bad bounce. I have tried everything, the only setup that stops it is the taps shimmed 120 ths down but I loose speed. Tested the keel mod with no taps and full tank of fuel. WOW no bounce past 45 and no side to side. It runs so straight it takes alittle more to make it turn. Some of the bounce returned when I got down to 2 bars but maybe now I can put my FF plate back on and shim it for some more speed.
    I don't see any better hole shot but when I return home I found that the jetwork valve was bad and wide open.
    If you have the bounce ( Porpoising ) you need to try this thing it's great IMO
    Mike
    thanks , Mike I appreciate you taking the time to post your results. like I said before if there is any questions you have feel free to call me.. thanks nate

  4. #4
    One day at a time..... N8R's Avatar
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    Quote Originally Posted by OsideBill View Post
    Looks like some great results with this mod I have a couple here that Spud and I will putting through the wash in three weeks.
    hurry the summer is almost over except for Florida

  5. #5
    spud's Avatar
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    Can't wait 80.1 with the plate at .780" should improve when the plate starts heading back towards .950"

  6. #6
    GPHOTROD's Avatar
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    Keel Mod?

    What is this keel mod?

  7. #7
    Moderator OsideBill's Avatar
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    Quote Originally Posted by N8R View Post
    hurry the summer is almost over except for Florida
    I actually rode this past weekend, first time since March. We have both seasons here in SoCal, Summer and not quite Summer.

  8. #8
    yami_rida#26's Avatar
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    does anyone have a picture of where exactly it installs to?

  9. #9
    ecpChris's Avatar
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    I don't think Nate wants anyone to post pics of it installed. It goes on the keel (right before the intake grate) on the hull.

  10. #10
    2000 GPRXP 4tec shooter98xpl's Avatar
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    it attaches to the hull and against the backside of the keel. I witnessed Mikey's ski from day one till he did the mod. Definately a huge improvement over what he's had in the past. Well worth it if you have porpoising problems.
    SHOOTER

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