MIrror vibration fixed and front wobble gone
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Road Captain
Joined: Nov 2016
Posts: 666
Likes: 95
From: Berlin
MIrror vibration fixed and front wobble gone
I know there are a million threads on this, but I had mirror vibration, left was worse than right, and the front wheel would wobble when I was slowing down and holding the bars ever so lightly, well I weigh 250 lbs and had my Fatbob shocks set at number 4, well I simply changed the shock setting to number 3 and guess what vibrations in mirrors gone, and wobble also, I could not believe what was happening, so I set my shocks down to number 2, and guess what wobble and vibration was back, so at 2 and 4 I had wobble and vibration, and at 3 no wobble and mirrors flat as a lake, I have no explanation for this, as it is surely a geometry thing, and I was rubbish in school.
Elite HDF Member
Joined: Sep 2008
Posts: 4,440
Likes: 148
From: Northwest
Harmonic frequencies... different masses resonate at different frequencies.. larger masses at lower frequencies, small masses at higher. You apparently affected the harmonic of all those parts bolted together with the shock setting... kinda weird, but then... science 
Thread Starter
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Road Captain
Joined: Nov 2016
Posts: 666
Likes: 95
From: Berlin
Harmonic frequencies... different masses resonate at different frequencies.. larger masses at lower frequencies, small masses at higher. You apparently affected the harmonic of all those parts bolted together with the shock setting... kinda weird, but then... science
Another addon to this is you have changed your exhaust or mufflers, have a good look under and see if any of the brackets are close to the brake rod etc, mine was just touching the brakerod, so another gremlin out of the way.
Last edited by Smogbob; Jul 17, 2017 at 03:24 PM.
Cruiser
Joined: May 2016
Posts: 135
Likes: 17
From: Mendocino, Ca.
A little over a year ago I did the clevis pin mod on my 2012 Switchback and the vibrations have been mostly gone but I recently put on pro-action shocks and to my surprise the residual floorboard and mirror vibes are even much more gone.
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