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  1. #1

    What fuel to use on a 2007 Kawasaki Ultra 250x

    I just bought a 07 Ultra and I am curious on what fuels people use and what others think. I know it requires premium, and having my father being a MB tech, he says not to use premium as it only makes fuel burn hotter. We have porsches and Supercharged cars and have never used premium and have never had a problem. On my 97 GSX I used 87 with no ethanol. Should I use non-ethonal fuel, regular or premium. Thanks


  2. #2
    Take the time to smile sirbreaksalot's Avatar
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    read the sticker near the fillercap....................they built it

    if your father will pay for any melted piston from shitty fuel choice thans thats even better

    its not a hard decision really !!!!!!!!!!!

    Waz

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    rhorne1053's Avatar
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  4. #4

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    The problem with the ski is the system has no knock sensor. It just assumes you have the correct fuel and the timing and fuel ratio is set that way.
    It's a poor setup but that's the way it is.

  5. #5

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    Quote Originally Posted by Dezl_Dr View Post
    The problem with the ski is the system has no knock sensor. It just assumes you have the correct fuel and the timing and fuel ratio is set that way.
    It's a poor setup but that's the way it is.
    That is amazing in todays high tech fuel systems that a knock sensor would not be present. I mean cars have had them for almost 20 years and it's a simple technology.

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    Quote Originally Posted by dmk View Post
    That is amazing in todays high tech fuel systems that a knock sensor would not be present. I mean cars have had them for almost 20 years and it's a simple technology.
    When u can't keep the sensors dry not that simple.

  7. #7
    Self Confessed Day Dreamer toomanytoys's Avatar
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    They are not that reliable anyway. Let's say all the conditions are met (in a lab testing setting) then you'll get the maximum power (on the brochure). Go ride it in the real world and there will be some "false" knocks that will rob some power. You won't always get full power.

    If you use the correct fuel you'll get more consistent power and it will be safe without needing a knock sensor.

    The 300x is a race engine. They aren't normally set up to use knock as a map input (alarms and light yes, but it takes some understanding to know if you really are "knocking").

    Cheers.

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