I may not be that much of a help as I'm 5' 6" and weigh 190lb with a 29" inseem. I'm running the stock seat with a short nap sheep skin. Most of the time a 500 mile is not a probolm. By the end of a 790 mile day it's time to get off. If you buy a B, get to the rally. There should be a good cross section of seat, riser, heli bar, windshield set ups to check out.