My left mirror vibrates more than right mirror?

Veryfast · Post by **Veryfast** » Sun Oct 07, 2007 11:18 am

Both mirrors are tight. On the highway especially -the the left mirror vibrates more making it difficult to use it. Anyone experiencing the same problem?

Post by **NoRRmad** » Sun Oct 07, 2007 11:38 am

Probably everybody. For some reason...

They all do that.

Post by **duke** » Sun Oct 07, 2007 1:57 pm

Probably 99.9% unlikely - but could this be related to the left side camchain tensioner upgrade?
Or rather due to the fact that it has not been performed ...

Post by **ruddy** » Sun Oct 07, 2007 4:08 pm

I don't think that's unusual. I'm sure how you grip the bars has an effect. For example, you're twisting the throttle on the right and may be merely resting your hand on the left w/o really gripping. My old Suzuki GS850 would do it most of the time, but I haven't noticed it very much on my R.

There's a simple fix. Check out this thread: http://www.r1150r.org/board/viewtopic.php?t=10043

Post by **boxermania** » Sun Oct 07, 2007 6:43 pm

Actually folks, this is an obscure fact not typically brought to light during the mirror discussions.

It so happens that our Teutonic friends missed the original design criteria on two very important aspects.....

bilateral symmetry - if you draw a line from the front to the rear of the bike, bisecting the bike, the left side is not the mirror image of the right side.

side to side balance - there is also, as a result of the above, a slight weight difference from the left to the right side of the bike.

These two small instances affect the natural frequency of the bike as a whole and when projected to the end of the bars it causes one mirror to excite, frequency wise that is, more than the other.

Yes, it is ifascinating how missing some design elements can come to affect the operational parameters of the end product.....

Post by **towerworker** » Sun Oct 07, 2007 8:00 pm

Just a thought----when was the last time you synced the TB's?

Wayne

dans58 · Post by **dans58** » Sun Oct 07, 2007 9:36 pm

My left mirror has vibrated more than the right since the day I bought it. 10,000 miles later, it's still doing it. Yes, I've had both the 600 mile and 6,000 mile service done by the dealer. No difference in the mirrors after service.

Post by **DSKYZD** » Sun Oct 07, 2007 11:29 pm

http://www.r1150r.org/board/viewtopic.php?t=10043

def38 · Post by **def38** » Wed Oct 10, 2007 10:24 pm

Next time you are seated on your boxer, look down at the cylinders and note that they are NOT in the same centerline. This means there are non-cancelling harmonic vibrations that are slightly magnified on one side of the engine centerline (through the crankshaft). Therefore, one side of the bike does support vibrations while the other side does not. But, because both mirrors and mounted into the same system (one piece handlebar assembly), both mirrors do vibrate...however not at the same harmonic frequency (RPM). You'll likely never get both mirrors to settle down at the same engine speed unless you shorten one of the mirror stalks.

Post by **ProductUser** » Wed Oct 10, 2007 11:18 pm

There was a post not to long about re reducing mirror vibrations. I believe adding some o-rings to the mirror helped absorb most of the vibs.

Others will chime in with the correct procedure.

ProductUser

Post by **ladybeemer** » Mon Oct 15, 2007 9:10 pm

I've had the Mickey mouse original mirrors, the K mirrors and now the cruiser mirrors. With the cruiser mirrors there is absolutely NO vibration. The other two always had one side vibrating more than the other.

Post by **duckdave** » Tue Oct 16, 2007 8:29 am

My left mirror has always vibrated, but it became somewhat less after a careful valve adjust and TB synch. Still there tho.

And my bike wants to drift left when I ride w/ no hands (not that I would ever do that). I assumed this was due to the shaft drive, but the bilateral a-symmetry and side-to-side un-balance described by boxermania could be the culprit, eh?

Veryfast · Post by **Veryfast** » Wed Oct 17, 2007 5:30 am

I tried the o-rings - it was a waste of time! The vibration still remains in the left mirror!!. BTW - tb sync is perfect, valves, etc. Might try a new mirror.