Master of mileage.

80K on my ST1100 in 10 years... 1500 on the busa in 31 days....
I am right at 20 miles per day right now. A couple trips to and from Alaska should do the trick.
Some of these people ride mega miles they must ride everyday or take a lot of long trips (which would be my guest looking at the types of bikes with the most milage)
My average would be very low on a per day basis, but when I ride, I usually put a minimum of 100 on her. Highest so far, about 650mi in about 13 hours.
Mine's a year and a month old with 16,640 miles.....most of that is curves, with about 500 track miles.