Help ZXR250 1994, Will idle perfect, only revs to 12k then stops running

Discussion in 'Kawasaki 250cc In-line 4's' started by timmeh01, Mar 20, 2015.

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  1. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    ZXR has vacuum petcock (doesn't it?) so should only leak or let fuel through if faulty or set to PRI.
     
    Frankster, Apr 27, 2015
    #61
  2. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    It sure does, so that means over time the petcock has leaked, the float valve o rings have leaked. I assume the engine was hydrolocked then the fuel passed thru the rings into the sump. @timmeh01 how long was it sitting?
     
    Th3_Huntsman, Apr 27, 2015
    #62
  3. Joker

    Joker See "about me" for contact details. Contributing Member

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    Fuel in the oil adds to the explosive experience.
     
    Joker, Apr 27, 2015
    #63
  4. timmeh01

    timmeh01 Member

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    Two years! And it was sitting on 'prime' which means fuel can just spew out without the engine on.
     
    timmeh01, Apr 27, 2015
    #64
  5. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    Well that's an issue lol. Hopefully that hasn't ruined anything.
     
    Th3_Huntsman, Apr 27, 2015
    #65
  6. billyleung

    billyleung Member

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    have you check float level? it should be 13mm
     
    billyleung, Nov 5, 2015
    #66
  7. timmeh01

    timmeh01 Member

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    Bike runs like a dream now :) After changing the oil (which had petrol in it) everything started working
     
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    timmeh01, Nov 5, 2015
    #67
  8. Joker

    Joker See "about me" for contact details. Contributing Member

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    Just make sure it's not still got a slow leak... if it's got a vacuum petcock it could mean your petcock diaphragm is buggered (alternatively float levels in the carbies, or an o ring problem). I'd be sampling and sniffing the oil on the odd occasion to double check...
     
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    Joker, Nov 6, 2015
    #68
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