I've read all kinds of stuff on the vibrating mirrors. I hopefully have attached some pictures of one thing I did that helped at least 50%.
I also thought it would be good to list all the things that can be done on one posting. At least all the things I've learned. I have a 2011 Versys.
Put BB's in handlebars.
Cut a car inner tube and place a layer in between fork top plate and handlebar riser. And another one in between handlebar clamp down plate. Remember to torque to 18 ft lbs all bolts on a 2011.
Sync Carb/throttle bodies.
Replace Mirrors with Aprilla Tuono Mirrors, part numbers AP8104921 and AP8104922. http://www.motointernational.com/
has mirrors for $23.95 Plus $10 shipping.
The other mirror that is suppose to do pretty good to is
KTM 990 Super Duke OEM 61112041000 1 29.73 Side: = Right Mirror
KTM 990 Super Duke OEM 61112040000 1 29.73 Side: = Left Mirror
KTM 990 Super Duke Mirror 58412040050 2 17.17 = Mount Adaptor
KTMtwins.com has them, I don't know what they cost.
Hope this helps someone and (legal disclaimer) I'm not recommending any of this, do it at your own risk.