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Running very smooth then rough cycle

Discussion in 'XJ Technical Chat' started by fender512, May 9, 2011.

  1. fender512

    fender512 Member

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    Here is a problem I can't seem to figure out on my own...

    Lately I will be cruising at highway speeds (appx. 5000 rpm in fifth) and I will get cycles of the bike being very smooth and then rough (slight vibration). Pretty sure it is coming from the motor almost as if the carbs are perfectly synched and then go out of sych for 30 sec- 1 min intervals. I can even tell a slight power loss when the bikes is in its rough interval.

    Any comments?
     
    fender512, May 9, 2011
    #1
  2. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Plug wires, plug caps or throttle shaft seals.
     
    bigfitz52, May 9, 2011
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  3. fender512

    fender512 Member

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    thanks Fitz....give those a try.
     
    fender512, May 9, 2011
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  4. wizard

    wizard Active Member

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    You might check that the vent in the gas cap is clear.
     
    wizard, May 9, 2011
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  5. fender512

    fender512 Member

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    Huh...that's something I would never think of...thanks!
     
    fender512, May 9, 2011
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