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  1. #1

    05 GP1300R: What mods should I change or add?

    I just picked up an 05 GP1300R with a few mods. Can anyone share their suggestions on what I should change or add next? Currently has: -Riva free flow exhaust, -Jim's modded ride plate, -cat con delete, -different size nozzle,
    -R&D heads
    -Riva efi controller
    -Riva filter w/sock
    -Riva intake grate
    -Hole shot mod w/jetworks
    -Pro Taper bars
    -UMI throttle
    -ODI grips. Mod to retain QSTS
    -PET Tach
    -Stepped sponsons


  2. #2
    powerstroke specialist mikegp's Avatar
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    Quote Originally Posted by nextlevelinnovations View Post
    I just picked up an 05 GP1300R with a few mods. Can anyone share their suggestions on what I should change or add next? Currently has: -Riva free flow exhaust, -Jim's modded ride plate, -cat con delete, -different size nozzle,
    -R&D heads
    -Riva efi controller
    -Riva filter w/sock
    -Riva intake grate
    -Hole shot mod w/jetworks
    -Pro Taper bars
    -UMI throttle
    -ODI grips. Mod to retain QSTS
    -PET Tach
    -Stepped sponsons
    first thing first. the free flow needs to go. it just make lots of noise and slow down the ski. next a set of wf3 reeds , will wake him out a bit, and a 4* key way as well. the rest looks good
    o and a nice 14/21 prop.

  3. +1 by:

    WFO

  4. #3
    What is a 4* key way? I just checked compression and came up with 119-121-110 taken with a decent gauge. Ski has 169hrs on it. WI will most likely replace the top end this winter since from what I've seen if sh!t breaks in this motor it's not cheap to replace.

  5. #4
    OzarkYamMonster's Avatar
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    Hello, and congrats on your new to you ski. The previous owner did a lot of mods ...but no prop change? Or just not sure. And you state changed /installed R & D heads ... but your compressions do not reflect any increase in compressions or RPMs. If anything a little low. You should change out the prop if you determine that the engine compression can support it. Not sure that is the case yet. The key way would increase your timing and thus up your RPMs some. Keep asking questions of this forum and we will continue to offer any help that we can. Good Luck

  6. #5
    Awesome, thank you! Yes, prop is still stock. I was just looking at it and noticed an aftermarket intake grate too. I figured comp was a little on the low side but since I grabbed this ski for $2600 I wont mind throwing a fresh top end in it. I took it out this afternoon and I'll post the couple pics I have of it from today.

  7. #6

  8. #7
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    triple pipes and a big bore kit is much needed

  9. #8
    powerstroke specialist mikegp's Avatar
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    Good looking machine.
    What type of comp gauge was you using?
    With head's comp should be around 150 psi . its real hard to determine if the heads were machine to lower compression back to factory, since you got it that way, it will be hard to believe someone will do that, but like the other member say , it looks low.
    I will recommend before spend any money on a new top end , check comp with different gauges,just to make sure.

  10. #9
    I will use a different gauge and pull #'s again tomorrow.

  11. #10
    Who makes a good steering nozzle for this ski? I'm going to start setting it up for running buoys for next year.

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