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  1. #1
    tealgreen2000's Avatar
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    1200 to 1300 swap

    Just put a set of non power valve cylinders my friends 1200 got a head that has 160psi we put 100 in the lows an 120 in the highs we've got the needles 1 1/2 on low and 1 on the high a 13/19 prop ski takes off good but only runs 64 mph it has a full stage two kit except the head it has 160 158 160 was thinking of putting a 14/20 prop was told this ski should run anywhere from 67 to 70 or more anyone know of maybe what my problem is any help appreciated thanks in advance do i need to change the needle and seat rom the 1.2 to a 1.5 or 2.0 will this help been foolin around with this all day need a little help if anybody knows what may help the speed thanks


  2. #2
    old school gp's Avatar
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    damn that thing is slow i wonder who did the work to it my old 1200 was faster then that,lol

  3. #3
    YamaSHO's Avatar
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    A 1300 is not going no where with a 13/19 you should pitch up atleast to a 14/21.5 if you have a full stage2. What are your rpm's now.

  4. #4
    tealgreen2000's Avatar
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    it was at 7250 rpm

  5. #5
    Ya Boy Trevor bajaeater's Avatar
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    ur jetting is way to small i just did the same build but with pv cylinders.

  6. #6
    tealgreen2000's Avatar
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    What sizes did you use in your build

  7. #7
    Hydrotherapy's Avatar
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    115 lows
    130 highs

    used these on my non pv conversion gpr....carbs by oside were perfect

  8. #8
    tealgreen2000's Avatar
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    Did u still have your accelerator pump connected

  9. #9
    tealgreen2000's Avatar
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    I know that's the slowest 1300 in history almost forgot its yours ha ha ha

  10. #10
    Crash Test Dummy Smitty's Avatar
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    What about your ride plate? Intake grate? Did you just slap them on and go? Gotta work with the bottom of the ski if you want to get any speed.

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