You can get aftermarket clip-ons that raise your position and ease the pressure on you back, I've got some on my GSXR, 2" back, 1" up and 1" wider I think, that little amount of movement does make a big difference. The ones I have are helibars, you can't really tell unless its parked up next to another GSXR without them. I also use a lower back support and can easily do 1 hour trips with no issues, I've even managed a day out on it with not much more pain than on the Triumph Street Triple. Just thought I'd share in case you really want the ninja...