Not many motorcycles that would vibrate like that big donk. I suspect rubber mounting would make it even worse. Just forget about looking in the mirrors and concentrate on the road ahead. Don't forget to head check (look over your shoulder) before changing lanes.
Okay, then, what about this, then:
http://www.reevu.com/moto_product.asp(It has an inbuilt rear view mirror)
If for nothing else, the mirrors will come in handy from time to time when pulling out from a parking space and whatnot.
Seriously, a mirror put on the handlebars of a motorcycle is getting a lot of "shakes", yet is quite useful on one of those two wheeled thingies. Even on a Guzzi or Ducati.
