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  1. #1

    ECU recalibrating itself.

    Ive read that the ecu on the 250 recalibrates itself from time to time depending on the temperature and other readings it obtains, can somebody knowlegable shed more light here?

    could this be the reason the ultra seems to slow down in the heat?


  2. #2
    benjahw benjahw's Avatar
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    gosh..it sure feels like it.. ski started sounding differnt and less rpms as soon as it hit 80+ temp here in Fl. i know of course temp and humidity affect combustion but it just plain sounds different which makes me think maybe the AFR is different now.

  3. #3
    how many rpms did you lose?

  4. #4
    benjahw benjahw's Avatar
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    like 200 250. gonna retighten the belt just to make sure.

  5. #5
    make sure you have the belt tension tool from kawasaki when you tighten it.

  6. #6
    fussy1's Avatar
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    And make sure the belt has no silicone or WD40 etc on it, mine did and what a difference after I cleaned it and sprayed some crc belt grip on it. Thought I were getting heat soak, then thought it was a loose belt but turned out to be a slipping belt with all the crap that was on it.

  7. #7
    benjahw benjahw's Avatar
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    well... it wasnt as warm today..maybe high seventies or eighty...but i tightened the belt up and i def was hittin the 7800'l...which is where i was before. so mostly the belt it looks like. I did not use the kawi tool. hope it isnt too tight. whats the worse that could happen. a break?

  8. #8

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    short term a break, long term crank bearing failure or sc bearing failure

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