At about 1,500 miles I was forced to ride my AVL home on the main highway around here (65 MPH) as the side roads were closed off due to snow.
I figured that 4 degrees F was as good a time as any to take my bike out on it's first high-speed run. Made it 34 miles, with 4 miles to go, and the carb iced up. Good thing that the last 6 miles of the trip are all on a steep downhill grade, eh? Also a good thing that the roads were bone-dry. I think a sheriff followed me for around 10 miles of it, all I remember is him passing me as I was putting along at 65 but I have no clue how long exactly he was behind me as both of my mirrors were frozen opaque.
At four degrees I didn't think I would have any problems with seizing, even at only 1,500 miles.