990 Vibration

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by PRJKTM, Sep 22, 2008.

  1. PRJKTM

    PRJKTM Adventurer

    Joined:
    Nov 8, 2005
    Oddometer:
    63
    I took my new 990 Adventure up the motorway for the first time today and was amazed at the terrible engine vibration I get through the handlebars.
    Cruising at anything about 4500 revs its so bad that it vibrates right up my arms.
    The 950 I just traded in didn't have any vibration.

    Any Ideas ?
    #1
  2. switchback

    switchback Eatin' Dirt Since 1982

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    I just tested one and I thought it was very smooth. Then again I drove in on a thumper.
    #2
  3. mookymoo

    mookymoo Mookish Mook

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    Either UK or Australia ...
    Throttle body balancing (still relavent on the 990, no?)
    #3
  4. Pax

    Pax shazam.

    Joined:
    Jul 22, 2006
    Oddometer:
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    Columbia MO
    Mine is very smooth. I would drive right back to the dealer and ask them to test it out for you if you can't get it sorted immediately. Have you checked all fasteners, engine oil, chain tension, etc?


    #4
  5. nunzo

    nunzo nunzo

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    Engine Vibration through the bars?? How about tire balance issue?
    #5
  6. minusone

    minusone Long timer

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    I reckon that might be a problem with mine.
    #6
  7. PRJKTM

    PRJKTM Adventurer

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    Definately not tyre balance because if you clutch in it goes, the vibration is also just as bad when you just rev the engine at a standstill.
    The dealer said to let the engine run in and loosen up and bit because it's only done 750 miles but I'm not convinced as my 950 never had this problem.
    #7
  8. fnfalman

    fnfalman Been here awhile

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    Feb 6, 2006
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    A lot of that vibration comes from both the windshield and the handguards too.
    #8
  9. Pax

    Pax shazam.

    Joined:
    Jul 22, 2006
    Oddometer:
    812
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    Columbia MO
    If you hadn't had a 950 I'd wonder if you were just touchy. However, the 990 should be just as smooth. It just doesn't sound right. Mine was smooth from day one. I'd go back to the dealer and ask them to look it over top to bottom again.

    #9
  10. PRJKTM

    PRJKTM Adventurer

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    Nov 8, 2005
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    I did think when I bought the bike that there was more vibration than my 950. But its definitely worse after I picked it up from the first service.
    You can even feel it through the seat and when I got off the bike tonight my arms actually ached.
    I hope this isn't 'just one of those things' because it will drive me mad !
    #10
  11. Mad Kaw Disease

    Mad Kaw Disease Dual Sport Diseased

    Joined:
    Jun 1, 2007
    Oddometer:
    534
    Location:
    Vancouver (NOT BC), Washington (NOT DC)
    Something definitely wrong with THAT bike (I know ....duh), I just mean it's not common to the model. Mine lugs like any V-twin at low RPM but really gets and stays it's smoothest starting about 4000 rpm.
    #11
  12. Tripndrag

    Tripndrag Tripndrag

    Joined:
    Oct 28, 2007
    Oddometer:
    76
    06 950 - Try adjusting the suspension. I went through all the settings listed in the owners manual and found the setting everything to comfort was the best when it was new. The performace setting gave lots of vibration. After a couple thousand miles I was able to crank everything to performance with no vibration. I also found going 45-55 MPH in top gear results in lots of vibration due to the motor lugging. My speedo is off 5 MPH when compared to my GPS also. Some roads around me are 50 MPH and I was really riding around at 45 MPH thinking I should re-gear the thing. 50 MPH is about as slow as I go in top gear before shifting down on flat ground. Hope that helps.
    #12
  13. emerson.biguns

    emerson.biguns All idiot, no savant

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    I've got the same problem with my '04 Adventure. 4200-4500 there's a horrible vibe.

    Can't be tires/suspension. It's RPM related not speed related.

    Tell me about throttle body adjustments? Cause and effect?

    Thanks,

    John

    Owner of the Fainting Goat (a 950 Adventure that spends a lot of time on its side...)


    (BTW, it's more jiggly than my DR350!)
    #13
  14. lc8john

    lc8john Been here awhile

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    Do one trip on highway above 6k rpm and 16x45 transmission and you will see what is vibration!:super
    #14
  15. emerson.biguns

    emerson.biguns All idiot, no savant

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    I read CP's article on carb syncing and have some questions...

    The STE flow meter that CP recommends comes in two sizes and an adapter is available. Which parts do I need?

    Using that flow meter, it sounds like I don't need to tap into the vacuum connections on the carbs? Just measure the flow at the intake? Do you need two to measure both simultaneously?

    Thanks
    #15
  16. gefr

    gefr Life is a trip

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    I would suspect loose central nut holding the baskets or even pressure plate bolts. How about a quick look? Cheers.
    #16
  17. emerson.biguns

    emerson.biguns All idiot, no savant

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    Well.....


    I didn't do anything until today. Hadn't been riding much, and bought a XR250R on Sunday so I was playing with that. Today I thought I ought to exercise the beast. Got sick of the vibes after 30 minutes around town and came home. On a whim I took the seat off and was looking down at the cylinder head and all around. I noticed a pair of fasteners that didn't match. The bolt that holds the right side subframe to the frame was backing out. I pulled the fasteners for the right side plastic off and tightened it up. I thought, well it can't get any worse... there's no way this is going to fix it, but I'll try it anyway. So I took it out for a test.

    :eek1


    :clap


    SIGNIFICANTLY better.

    Not perfect, but even at lower RPMs it's noticeably better. After I burn off the gas I filled up with today, I'm going to tear it down and re-torque everything. It's probably time for a good once over. I bet I have a few loose screws....




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    #17
  18. DetR6oit

    DetR6oit Been here awhile

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    When I first picked my 08 up from the dealer in July my hands went numb from the vibes on the freeway.

    That was the one and only time though. I have 7000 on it now and done a 1000 mile day once even, and never have never had problems with it since that first day. So either I got used to it or it went away.
    #18
  19. 990S Pilot

    990S Pilot Is this round trip?

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    Glad you found something that helps the problem though it's a shame you have to do the dealers work for him. I believe "check all fasteners" is a required part of the first service.
    #19
  20. emerson.biguns

    emerson.biguns All idiot, no savant

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    Na... It's an '04 w/ 20K miles. From what I understand, it's seen some pretty heavy riding.



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    #20