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Thread: Ultra 63 MPH

  1. #1

    Ultra 63 MPH

    6 Hours Just BROKE IN

    96 degree & little more then 1/2 tank fuel
    MAX Speed 62 ish to 63 ish
    RPM - 7650-7750
    Speed is checked with GPS
    The current Mods are RIVA STAGE I Kit Minus the Ride Plate and Intake (Still on Back Order)

    VERY DISSAPPOINTED !!!

    Are these typical Numbers???

    Is their something wrong with my ULTRA 250?
    Last edited by carolinafloats; 08-30-2007 at 09:06 PM.


  2. #2
    check your oil, recommend that the oil level is just barely above cold at cold temp.

    Unfortunately, I am hearing of and seeing a wide variation of top speeds from the ULTRA 250 in out of the box form - the slower ones appear to be at 63 ish out of the box, and the faster ones seem to peek out at about 66.7 to 67 mph GPS. As everyone on this site knows, there are many variables that can impact top speed (temp, conditions, weight yada yada yada), regardless there appears to be a significant range in out of the box top speeds w/the 250x. Could it be the mass production process? I don't know........... mine appears to be one of the slower ones at about 64.5

  3. #3
    john07ex's Avatar
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    Nope sounds about right..but ur RPMS are much higher than mine..
    i do 7290 @64mph
    smoedays ive seen 7400

  4. #4

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    Both of mine with around a half tank have been 65 mph skis. I have seen 66.6 out of my wifes 100% stock.

  5. #5
    rhorne1053's Avatar
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    96 degree & little more then 1/2 tank fuel
    MAX Speed 62 ish to 63 ish
    RPM - 7650-7750

    DISSAPPOINTED !!!

    Are these typical Numbers???

    I am guessing that is speedometer speeds. With the rpms you are turning that would be about 65 to 66 mph using gps.

    Which carolina and where?

  6. #6

    Octane booster

    On my Lake only 89 octane gas is avaiable should I use octane booster to get my octane over 90. I AM ON LAKEMURRAY

  7. #7
    ercBOOSTED's Avatar
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    thats your problem. Ski requires 91 octane or above. You should do what the manual says man. Good luck. Those numbers are not typical. If you are running the right octane and you get the oil level right and some other things, stock ski should run 65-67.

  8. #8
    I Have carrying Gas Cans of 93 Octane Gas so that isnt the problem. Just HATE carrying 20 GAL of gas just wondering is I can use the octane booster instead

  9. #9
    Do Not Use Octane Booster !!

  10. #10
    rhorne1053's Avatar
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    Carolinafloats, I live on Lake Marion and the closest gas station to me is about 30 minutes away. I bought a 28 gallon portable gas tank and keep it filled. That way I don't have to worry about running to the station.

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