Kx 80 tech question.

Discussion in 'Motorbike Technical Discussion' started by timr, Sep 15, 2003.

  1. timr

    timr Guest

    Hi, can anyone advise me what the crankshaft runout tolerance
    should be for the Kawasaki kx 80? The bike was a basket case,
    and is in the process of being rebuilt. The big end bearing was shot
    so I pressed the crank apart and fitted a new Pin/cage/rollers/rod.
    I trued the crankshaft to within 001'' across both main bearing
    surfaces, fitted the rebuilt crank to the bare crankases with new
    main bearings.

    On checking the crank runout at the generator end (bottom of the taper)
    this was found to be 009'' ....hmmm.

    Is this acceptable? Any help here would be much appreciated.

    timr, Sep 15, 2003
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  2. timr

    timr Guest

    Cheers for the input Harry.
    I split the cases again & removed the crank today.
    I checked the distance across the flywheels in a transverse direction
    ( I neglected to do this earlier) & found the cause of the runout...
    measured at the crankpin ...zeroed the micrometer.. opposite the
    crankpin +004'' . The crank was splayed out opposite the crankpin.

    Another bit of tweaking on the flypress and I now have a runout
    of less than a thou everywhere...nice.

    timr, Sep 16, 2003
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