First off I will say, I am 6'3" and about 350lbs.
I just got my 2002 Vulcan classic 1500 and it is killing me! It came with a generic mustang seat (like the studded wide touring seat). It is hard on my tail bone area (numb and painful at the same time) when I ride in town and when I ride on the interstate my legs sit up too high (above the tank) so the muscles in my inner thighs begin to get tired from holding my legs in against the tank, otherwise my legs spread wide open and I look like a big frog riding down the road.

I feel like I need to get my floor boards forward a bit so I can streach my legs out some. I have some highway pegs and if I lay my legs on them on the interstate I get some relief.
I am also looking at an airhogs seat cover, but it would be hard to come up with the mony after just buying the bike.

Any advice?

 

My Classic also has the mustang seat and came with a removable drivers backrest. At first I didn't use it but after trying it on a long ride I use it regulary now. I'm 6'4" and about 280. You can also try bringing your handlebars back a little.