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Vibrations

Discussion in 'XJ Technical Chat' started by Scorpion1016, Jul 11, 2016.

  1. Scorpion1016

    Scorpion1016 Member

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    Hi everyone my xj750 has a harsh vibration above 5000 RPM I have adjusted the valves and the carburetors are synced and cleaned I think the issue is in the drive shaft any ideas are appreciated
     
    Scorpion1016, Jul 11, 2016
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  2. DrewUth

    DrewUth Active Member

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    Vibration when stationary, while riding, or both?
     
    DrewUth, Jul 12, 2016
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  3. Jetfixer

    Jetfixer Well-Known Member

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    Have you ever rode a Harley? they VIBRATE all the time... My 750 Seca has a vibration around 5000 rpm I just go faster . personally I would not be worried unless you can't hold onto the handle bars or your berries feel numb .
     
    Jetfixer, Jul 12, 2016
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  4. mc1oo1

    mc1oo1 Member

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    Harleys are named paint shakers for a reason.
     
    mc1oo1, Jul 12, 2016
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  5. Scorpion1016

    Scorpion1016 Member

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    It happens while riding. It is enough to vibrate the mirrors. Just wanted to make sure it wasn't a serious problem
     
    Scorpion1016, Jul 12, 2016
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  6. TheCrazyGnat

    TheCrazyGnat Well-Known Member

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    That is completely normal. If you take it up to around 6k does it go away?
     
    TheCrazyGnat, Jul 12, 2016
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  7. Stumplifter

    Stumplifter Well-Known Member

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    Stumplifter, Jul 12, 2016
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  8. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The mirrors should not be blurry.
     
    k-moe, Jul 14, 2016
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  9. mc1oo1

    mc1oo1 Member

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    He should just clean the mirros


    *DRUMROLL*
     
    mc1oo1, Jul 15, 2016
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  10. DrewUth

    DrewUth Active Member

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    We need more info. But, in the absence of that...are all your motor mount bolts present and tight? Wheels/tires balanced- check for cupping on the tire tread? Pull the rubber boot back at the swingarm/driveshaft/engine/frame junction- does the u-joint look ok? Any play in it?
     
    DrewUth, Jul 18, 2016
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  11. Nuch

    Nuch Well-Known Member

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    LOL
     
    Nuch, Jul 18, 2016
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  12. OldFleetGuy

    OldFleetGuy Member

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    My 650Maxim has the "buzz" too - most pronounced at 5K - 5.5K. This may help reduce your handlebar vibration and is cheap. I assume your handlebar is hollow and has no internal wiring. Go to your local home improvement store and get a couple of regular 'caulk size" tubes of silicone ( and a dispenser if you don't have one). Remove the bar grips, and pump the handlebar completely full of the stuff. Wipe off the extra. The next day, the ends will be dry but what's inside will remain viscous for a long time. It acts like a dampener. Hope this helps.
     
    OldFleetGuy, Jul 18, 2016
    #12
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