How much time do you have for the whole trip?
When I first got my 650 I was commuting 1/2 hour each way, took longer rides on the weekend. I was surprised to find I hit a wall after only about 2 hours of riding.
After a point you are still tired and sore even after a 30 minute break, and pushing yourself further is just an ordeal. If you get half way there and find you are spent, its not a terrible thing to spend the night at a motel at the mid point. Good to have that for a backup plan, esp if you start to not feel well (headache, cramps, numb legs...).
If you dont have a windshield on your bike 75mph for 520 miles is going to give you a pounding.
Have you taken 4 or 6 hour road trips before?
The other thing I have found, riding on secondary roads you get to stop every 10 or 20 miles or so for an intersection or a turn, put your feet down, stand up, wiggle your butt. On the interstate its 2 hours straight of sitting in the seat with your feet on the pegs. The only thing I have found that helps there is to push your knees forward and back, in opposite directions. It lets you wiggle your butt on the seat and get your blood flowing.
Last edited by KCW; 10-18-2018 at 08:21 AM.