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  1. #1

    attn: yama-gurus

    i have a customer that wants to modify his GP1300. he has approx 2500 to spend. what mods would you recommend? please be brand specific. biggest bang for the buck stuff. i was thinking efi controller, intake grate, ride plate, flame arrestor, prop, ???????

    race tech

  2. #2
    What year 1300? Does He have the 05 pump?

  3. #3
    ABBOTT's Avatar
    Join Date
    Jul 2005
    Birmingham, AL / Lay Lake
    sent you a PM Rotax.

  4. #4
    mile_hi_1300's Avatar
    Join Date
    Nov 2005
    I'd say it's important to start with the basics; Pump Plug Kit, D-plate and chip, Jetworks mod, PET 2100 Tachometer, R&D 2 bar intake. I'd say thats one of the best places to start. From there I added Riva rec heads, a prop from Carl at Island Racing, an EFI controller, Delta V-Force reeds, a Riva race filter and a 3 degree keyway. I ride in pretty rough water most of the time and the stock plate is generally regarded as best for rough water hookup. I'm sure 90% of the guys around here are running a modified R&D or Riva plate though. There's no doubt that they are faster than the stock plate. I'm running at a mile high (5280 feet) and I love this setup. I can only imagine what lower altitude performance would be like. That's my opinion. Good luck.

  5. #5
    JetSkiDaddy's Avatar
    Join Date
    May 2005
    Houston, TX
    Welcome Mark,
    Nice to see you tinkering with a Yami
    Here are some good basic mods. Ben Herman can correct me if I am wrong or missing anything, but these are pretty much the mods that Ben used on Paul T's non ported 1300 to run 75-76mph.

    Milled or after market head
    R&D D-Plate (supposed to be good for 50 more rpms)
    Fercho VF3 reed set up with spacer (suppossed to be good for 80-130rpms)
    Fercho Jetworks mod
    3 deg keyway
    EFI controller
    R&D ride plate - modded by Jim
    R&D double bar intake grate (dont use the stock for over 70, you will get pitched)
    05 pump set up w/85mm nozzle. Remove and blockoff syphin tube out of noozle(suppossed to be good for 80 rpms). Add bilge or duck bills to remove excess water.
    dynafly 14/20
    Pump plug kit
    stepped stock sponsons (you can get aftermarket later )

    You and Jerry are buds, I am sure he can get you some good deals on some of these parts.

    Good luck with the Yami

  6. #6
    YudLuz2's Avatar
    Join Date
    Jun 2005
    Flowood MS
    Mark, JetskiDaddy is right on the money. P.M. if you need
    more details. There some stuff you can do without and still
    go fast.

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