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Thread: I want 80mph.

  1. #1
    cmherrera's Avatar
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    I want 80mph.

    What do I need to do? I have a 2000 GP1200R. Novi 48, 1300 cylinders, case ported by IR. gas valves, Lowells 150psi head.


  2. #2
    Mik72e's Avatar
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    Lowell Horning Porting to start with
    Timing
    Handling package and ur off.

  3. #3
    mrbtd's Avatar
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    D you have a Jims plate already ? With what you have you could get to 76+

  4. #4
    You need;

    1. Jims FF plate
    2. VF3 reed valves
    3. 05' pump assembly
    4. Dynafly prop pitched to around 14/24
    5. Advent ignition

  5. #5
    cmherrera's Avatar
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    I will start by sending Lowell my cylinders. next I will call Jim. What about the stock pipe. What mod could I do. I have a D plate. I also have Factory Tripples pipes and Riva stinger 2, but I want to stick with the single pipe.

  6. #6
    One of the most important things invloved in getting a 2 stroke single pipe gpr over 80 is patience. The willingness to spend time with your tabs, plate, shoe and grate combo will get you over 80... When you get all the parts you need, then install them, be ready to spend several weekends shimming and logging data on paper. Then amount of minor adjustments on a gpr hull that make a difference is sometimes mind boggling,and that makes it easy to get lost, so remember also,,, only one change at a time!

  7. #7
    philip_gpr's Avatar
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    the stock pipe works fine, with it you want to use a D plate that has been opened up somewhere between .100 to .200 inch (remove material from the flat side of the D to increase the width of the D)

    you are also going to need a Dynafly with a big pitch - something like a 15/24 or 15/25

    I have several extra Dynafly impellers for sale, they are all mint, I am selling them because they are all too small for my BB single pipe ski

    I would sell each for $250

    15/24
    15/25
    15/27

    the 15/24 would be perfect for you planned ski

    If interested please let me know

    philip
    [email protected]
    Last edited by philip_gpr; 08-10-2008 at 09:22 PM.

  8. #8

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    Advent ignition - is this important if you already have a Riva one? Not familiar with the Advent. Thanks.

  9. #9
    philip_gpr's Avatar
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    Riva ignition works fine

  10. #10
    cmherrera's Avatar
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    Do Riva still make them?

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