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Weird Vibrations...

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Old May 22, 2009 | 08:50 AM
  #1  
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dmaxey
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Question Weird Vibrations...

On a 08 UC with just over 5k miles on it, I’m getting a weird vibration in the front end when coming to a stop and low speed turns. It’s not real bad, but noticeable nonetheless.

I’ve read on here about doing some adjustments with something on the front end concerning the wobbling effect, but am not sure if this is the same issue with my bike.

After spending $23k + for the bike, I don’t want to give the dealership any more of my money if I can avoid it. So, I like to get some input from you guys and see if I can resolve this myself.

Would this be addressed in the owner’s manual for regular maintenance?

Thanks in advance for the input.
 
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Old May 22, 2009 | 09:07 AM
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dmaxey,
Do you have a bike lift (not a table lift, but jack style lift)? If so, you might put the bike on the lift, then roll the front wheel pretty good and see if it rolls smoothly. If the front wheel doesn't roll smoothly, you may have warped rotor or possibly something in the axle/hub. I'm not a wrench, but some thoughts for ya.
 
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Old May 22, 2009 | 09:09 AM
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I've had front tires make odd sounds and vibrations as you describe at slow speeds, so that could be the source. I always ignored it and it never caused any problems. OTOH it could be a front wheel bearing so I would take it to the dealer and let them deal with it in warranty.

The front-end "wobbling effect" you mention is caused by loose steering head nut, but I don't think what you describe has anything to do with that area of the bike. You don't feel any such wobbling, do you?
 

Last edited by iclick; May 22, 2009 at 09:11 AM.
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Old May 22, 2009 | 09:19 AM
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When did you last get a tire replaced, if you have?
Make sure the monted the tire on the wheel properly, the valve stem should be on the right side of the bike.. (rear brake side) pointing out at you.

I had a tire mounter mount it opposite that, as on 07s (believe this or not) the brake pad on the Left is marked R and the brake pad on the right is marked L. Doesn't that make perfect sense?

I also had an almost imperceptible (to anyone but me) higher speed vibration due to this. I felt it as a buzz in my *** after a coule hundred miles.
 
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Old May 25, 2009 | 12:54 PM
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Default Update..

Took the bike to the stealership and had to wait for 6 hours in line, but they found that the neck bearings had broke-in slightly and need to be adjusted. That was it in a nutshell.

They said that per specs, the auto correction in the steering should only take 3 cycles, where mine was taking about 6. Not completely sure what that was all about, other than its back to normal.

Thanks for all the input.
 
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Old May 25, 2009 | 01:02 PM
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Originally Posted by dmaxey
Took the bike to the stealership and had to wait for 6 hours in line, but they found that the neck bearings had broke-in slightly and need to be adjusted. That was it in a nutshell.

They said that per specs, the auto correction in the steering should only take 3 cycles, where mine was taking about 6. Not completely sure what that was all about, other than its back to normal.

Thanks for all the input.
Thanks for sharing that. I've never heard of loose neck bearings causing a vibration like you described.
 
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Old May 25, 2009 | 01:17 PM
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Originally Posted by dmaxey
They said that per specs, the auto correction in the steering should only take 3 cycles, where mine was taking about 6. Not completely sure what that was all about, other than its back to normal.
Auto correction is the descriptive procedure for checking - with the front end off the ground and ALL interferring attachments removed, with the wheel turned to the farthest postion left (or right) and relesead, it should swing past center in the opposite direction, then past center in the other direction and finally return to the center position. 3 swings, left to right to left to right, stopping at center.

PS this only for FL's with reverse design triple trees....
 
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