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Barback King
Join Date: Apr 2001
Location: Now it's Nevada
Posts: 12,032
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Occilating Vibes
I recall someone posting something about an oscillating vibration that seemed to come from the rear end.
I was riding home thru traffic yesterday and the bike seemed to be doing a strange oscillation, almost like an out-of-balance feel around mid-revs at steady speed. Hard to tell what was going on with the traffic noise, winds, and helmet muffle. Is this some kinda sign? I'm thinking maybe I should find a dealer and have it looked at before doing triple digits again. The storey aboutthe guy locking up the raer end at speed last week scares the beejeesus outta me. Never worried about this kinda crap on the /7...ever... Input please. 
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R11S CNC BARBACKS |
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05-23-2003, 09:01 AM
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Join Date: Feb 2001
Location: Pennsylvania USA
Posts: 2,016
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Yeah that's what she said...
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05-23-2003, 09:10 AM
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Barback King
Join Date: Apr 2001
Location: Now it's Nevada
Posts: 12,032
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Gee, thanks for the feedback...have a nice holiday kids.
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R11S CNC BARBACKS |
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05-23-2003, 03:53 PM
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Registered
Join Date: Nov 1999
Location: Bellingham WA
Posts: 3,603
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A bunch of us have had this problem. It seems somewhat inherent in the beast and several have speculated that it might have something to do with the phasing and angles of the rear u-joints.
I don't know if anyone has associated the noise with a reliability issue. Mine comes and goes, although it seems worse since I replaced the shocks. Currently, I have it fairly consistently in 4th gear between 3K and 3.8K RPM. Get out on the road in sport riding and I never notice it. I'm about to fit a shorter paralever and am hoping that this solves it. I'd monitor it, but not get too excited. - Mark |
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05-23-2003, 10:45 PM
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Registered
Join Date: Oct 2000
Location: nsw, australia
Posts: 340
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I don't believe it's the drive shaft/ uni joints, as it goes away when you pull the clutch!!!!!!
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05-23-2003, 11:43 PM
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Registered
Join Date: Oct 2002
Location: birmingham uk
Posts: 502
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good vibrations
Hi all,
Mine has done that since i got the bike,its a fourth gear thing only.I get around it by not cruising in fourth gear,as when giving it some through the gears you dont notice it.Dont worry i'm sure your bike aint gonna fall to bits on ya! GUS |
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05-24-2003, 01:17 PM
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Registered
Join Date: Oct 2000
Location: nsw, australia
Posts: 340
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yeh, mine has done it since new also. I got the same diveshaft/uni's out of phase response from the wrench, but he couldn't find anything/didn't make it better when he pulled the shaft and re-aligned it. Still does it now, but only notice it when you are watching the speedo as you pass the speed cameras. Did I forget to mention that it goes away when you pull the clutch???????????????????????????????????????????? ?
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05-25-2003, 12:58 AM
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Registered
Join Date: May 2003
Posts: 7
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I’m with BMW Motorrad USA. I’m sorry to read about your problem with your BMW. If you want our assistance, please phone us at (800)831-1117, Option 4.
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BMW Motorrad USA Customer Relations |
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05-30-2003, 07:30 AM
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Registered
Join Date: Sep 2002
Location: Kirkland, Washington
Posts: 676
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The first thing I would do is run it on the centerstand, confirm that the tire is running true.
Has anyone had the driveline apart recently, if so I would question phasing of the two U joints Check the rear swing arm pivot and rear wheel for play.
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Dave Hopkins '01 R1100SAL, KTM 400 EXC 1974 Husqvarna Vintage MX bike Infinity Q45, Toyota Tundra |
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05-30-2003, 07:42 AM
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Join Date: Jun 2002
Posts: 731
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My 99 did the oscillation thing more than the rest of the S's i have
owned. Haven't noticed it with the 04. When i was doing Tranny recalls last fall I noticed that the R1150 GS Adventure has a notch on the rear driveshaft/universal. The rear universal can only be installed into the driveshaft one way. Both front and rear universals are in line with each other. TJS |
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05-31-2003, 01:42 AM
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Registered
Join Date: Oct 2002
Location: birmingham uk
Posts: 502
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Anyone phoned BMW USA customer helpline yet?What kind of help your getting?
regards gus |
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05-31-2003, 03:12 AM
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Barback King
Join Date: Apr 2001
Location: Now it's Nevada
Posts: 12,032
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I haven't yet. Riding this weekend though, I noticed it constantly in the 3-4K rpm range. This is somethng new. Bike has 14.5 K on it.
Kind of a thrum thrum vibration. It seems to be coming from around the clutch and tranny area. Is there a possibilitie of an out-of-balance clutchplate? Hmmm....
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R11S CNC BARBACKS |
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06-02-2003, 07:18 AM
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Join Date: Jun 2002
Location: Canberra, Australia
Posts: 44
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My 2000 S does the thrum-thrum in 4th gear. My dealer fitted a so-called soft shaft. It significantly reduced the thrum-thrum but didn't completely remove it. The soft shaft supposedly has a much heavier rubber damper. The new shaft had the same part number as a normal shaft. He also checked the alignment of the U joints but apparently they were Ok.
Dave |
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06-02-2003, 07:27 PM
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Join Date: Feb 2001
Location: San Ramon CA USA
Posts: 174
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It has also been stated that it could be a failing output shaft bearing.
Mine has been doing it for about 2000 miles now. Mark |
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06-04-2003, 05:57 AM
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