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vibration under the seat at 60 mph

Discussion in 'XJ Technical Chat' started by LAN_MAN, Jun 12, 2008.

  1. LAN_MAN

    LAN_MAN New Member

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    I have a 1982 XJ650j stock

    I bough the bike about a month ago and replaced tires, breaks,changed all oils, re-greased everything I can.

    The problem is when I get the bike above 60 mph I get a vibration/ almost like a buzz under the seat

    How do I go about finding out what is wrong?
     
    LAN_MAN, Jun 12, 2008
    #1
  2. southpaw

    southpaw Member

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    Lan Man I have the same vibration on my bike at 5k rpm about 60 I think it the harmonics if the engine because it goes away above and below that speed
     
    southpaw, Jun 13, 2008
    #2
  3. MiCarl

    MiCarl Active Member

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    Yep, standard on the 650. Mine does it too.

    Where in MI?
     
    MiCarl, Jun 13, 2008
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  4. Great_Buffalo

    Great_Buffalo Member

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    The nature of the beast. My 82 650 max does it between 5200 and 5500. Right at 65 mph. Annoys the crap out of me but thats the beast. I fine myself going 60 mph or 70 mph rarely in between.
     
    Great_Buffalo, Jun 14, 2008
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  5. MidniteMax

    MidniteMax Member

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    Yup.

    Same thing here. Really smooth below 61 mph, then buzzy up to 67 mph, then smooths out again. My first brand new 1981 XJ650 was exactly like that.
     
    MidniteMax, Jun 15, 2008
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  6. ozxj900

    ozxj900 New Member

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    yeah my xj 900 does the same thing at 100kph/60mph i just sit a little over 100 and it goes away, it must juat be the design of the bike as mine does the same thing on the other side of the world.
     
    ozxj900, Jun 15, 2008
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  7. LAN_MAN

    LAN_MAN New Member

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    Location:
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    I am very new to motorcycle.
    This is my first bike.
    I just got my license about 2 weeks ago after taking the Motorcycle safety.
    No riding experience before the class, except a few day running around my friends yard

    The fasted I have gone on the bike is 60mph.

    Thanks for you replies.

    I will take the bike faster and see what happens

    Thanks
     
    LAN_MAN, Jun 16, 2008
    #7

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