Is this the norm

Took Trixie out today, that's what I call my 2010 America and went on the motorway for a short stint.
Now, it's comfortable up to 60 mph but at 70 mph a general vibration starts to appear. Obviously at this point I can't go any faster so I went to the nearest private airfield. Once there I wound it past 70 mph and my eyeballs must have been spinning as fast as the wheels. My sight was a blur and I could not read the speedo. Judging by the area the needle was pointing to I reckon it was indicating about 110 mph. I didn't particularly feel any bad vibration through my hands or feet, or through my arse for that matter. So I was just wondering if any other America riders have had a chance to ride at speed and what your experiences where.

 

Thats a good point about the wheels being out of balance, never thought of that. Should be easy enough to get them checked out.