My take on the stock seat.....the stock seat is fine for several hours if you're riding in a somewhat leaned forward sport riding postion. The problem for me is after 4 plus hours I tend to start riding in a more upright postion. The stock seat is angled a few degrees up in the back, this causes my butt to get too much pressure in the upper areas, which cuts off blood flow and I get uncomfortable( that burning monkey butt). I bought a used sargent seat which has a slight pocket to sit in which pretty much solved my monkey butt. I did get the yamaha comfort seat, also used, and it is an improvement over stock, but not too much. I was going to sell it, but the passenger seat on the yamha comfort is pretty good and my wife likes it.
There's a bunch info info here about seats.......
