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03 KX65 stopped

Discussion in 'Motorcycle Tech Talk' started by wags45, Apr 7, 2013.

  1. wags45

    wags45 New Member

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    I have a KX65 that I bought for my son, it was rebuilt top and bottom end (previous) owner put reg gas in it. Ran great for about a hour then shut off. now rolls over real hard. took the top end off. jug ect. still rolls over super hard. Crank out of it? any ideas?
    Thanks Jim
    wags45, Apr 7, 2013
    #1
  3. cowboy

    cowboy Moderator Staff Member

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    welcome to bike talk , wag is this a 2 stroke engine ? I read its a water cooled engine ,if 2 stroke & just reg gas & no oil mix it most likely fried the piston
    cowboy, Apr 7, 2013
    #2
  4. wags45

    wags45 New Member

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    Yes.. liquid cooled 2 stroke. Have the top end off now. Perfect conduction. Something Dow. Low. Won't roll over freely. It had been rebuilt since the previous owner put reg gas in it. I'm running 50/1 in it now. Piston burning perfect. Crank?
    Last edited: Apr 8, 2013
    wags45, Apr 8, 2013
    #3
  5. cowboy

    cowboy Moderator Staff Member

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    Ya it could be , Do you have a service manual for this model ? If the top looks good read up on the botton end just might be a simple fix
    cowboy, Apr 8, 2013
    #4
  6. jammerj

    jammerj Member

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    50-1 sounds a little lean on the oil side, used to run mx bikes at more like 25-1. better make sure of the mix once you get her straightened out.
    jammerj, Apr 11, 2013
    #5

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