My 2011 does the same thing...scared the CRAP outta me the third day I owned it when I was adjusting my gloves while coasting through 40 mph to a stop. Dealer said they "couldn't reproduce the problem"...just like they can't reproduce the high intensity vibration that is actually AUDIBLE in the front end as soon as I head into a corner.
I have a local independent shop telling me that's most likely the wheel bearings for the "humming" vibration and the head bolt for the wobble. I'm taking it in for a new rear tire this week and he's gonna check everything else out in the process.
**Cleverly Disguised as a Responsible Adult**
2012 RG CVO