I'm ~ 6'1" but have really long legs, don't know my exact inseam and have fz1 bars but, pretty much like everyone else has said when cruising, commuting, running a errand, or pretty much just riding normal I slide all the way back, if I've been in the saddle a while sometimes I'll hop up on pillion seat, or slide up to sit straight up with my feet on the sliders just to change position and put pressure on other areas of my rear. But when I'm really thrashing it in the mountains I slide up as far as possible, and try to pinch the tank in between my legs so that I hopefully won't be sliding forward and backwards between acceleration and deceleration, but it never fails I often find my self sitting halfway up the tank or in the spot where I normally ride in. I need to get some tank pads and some sort of a seat cushion with some grip