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Vibration @ 4,000rpm

Discussion in 'XJ Technical Chat' started by knuts2a, Sep 17, 2008.

  1. knuts2a

    knuts2a Member

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    Hi riders, i seem to be getting a vibration that starts @ 3,500 and goes to just over 4,000rpm in all gears. Runs ok otherwise, timing chain a little rattlely at start, but so am i at 6:30 in the morning. Planning a 1,600Km ride so want to get it all sorted before i head off. Any ideas?
    PeterN
     
    knuts2a, Sep 17, 2008
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  2. kontiki

    kontiki Member

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    My maxim has always had a slight vibration or 'resonance' at around 4500. It took me a while to notice it, I think it is the nature of these engines. Unless your mirrors go blurry I wouldn't worry about it.
     
    kontiki, Sep 17, 2008
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  3. bill

    bill Active Member

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    +1 there is a natural resonance - my 650 it is about 5k
     
    bill, Sep 17, 2008
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  4. pvtschultz

    pvtschultz Member

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    +2. Mine is between 4,000 and 4,500 RPM. At 5,000 RPM it is dead smooth going down the road.
     
    pvtschultz, Sep 17, 2008
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  5. stereomind

    stereomind Active Member

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    Ha! my Seca vibrates all the way from start to stop! Rigid motor mounts FTW!!

    The Maxim mill I got for it should be a bit smoother.. I hope. :mrgreen:
     
    stereomind, Sep 17, 2008
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  6. RickCoMatic

    RickCoMatic Well-Known Member

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    It only take about 25 or 30-minutes to do a Manual resetting of the Cam Chain Tensioner.
    That would be a good little project to do before hitting the road for a long haul.

    The Cam Chain Tensioner on the 900's is of the Automatic variety.
    Give it a go!
     
    RickCoMatic, Sep 17, 2008
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  7. rpgoerlich

    rpgoerlich Member

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    Keep it above 4k rpm, problem solved!
     
    rpgoerlich, Sep 17, 2008
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  8. G-Man

    G-Man New Member

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    Same here.
     
    G-Man, Sep 17, 2008
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  9. clhannah

    clhannah Member

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    signed, except my exhaust rattles too :-(
     
    clhannah, Sep 18, 2008
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  10. kd5uzz

    kd5uzz Member

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    4.8k to 5.2k, helps keep me from going over the speed limit. My 'speeding' speed is right in that range, so I try to avoid it. Although sometimes I avoid it by going even faster...
     
    kd5uzz, Sep 18, 2008
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  11. Harmonic

    Harmonic New Member

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    My "harmonic resonance" is from 4k to about 4.5k. Annoying but what are ya gonna do?
     
    Harmonic, Sep 18, 2008
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  12. sagebrush

    sagebrush Member

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    SO EVERYONE HAS A VIBRATION AT SOME CERTIAN RPM... I HAVE ONE TOO.. IT MAKES THE GAS TANK BUZZZ FOR ABOUT 2 SECONDS..

    BUT I THINK I HAVE A MISS IN THERE SOMEPLACE TOO... WORKING ON THAT ...
     
    sagebrush, Sep 20, 2008
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  13. RickCoMatic

    RickCoMatic Well-Known Member

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    I think you should all take the batteries out of your vibrators and just ride the bikes and smile!
     
    RickCoMatic, Sep 20, 2008
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  14. knuts2a

    knuts2a Member

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    Ok, in the morning its good (cool) on the way home it vibrates (warm), came home late tonight (cool) and it was good. Seems to like cool air better. New front tyre going on this week and some new Rjays riding pants as well, so when the budget catches up i might take to a dyno and see what they can find. Hate vibrations.
     
    knuts2a, Sep 29, 2008
    #14

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