Im curious as to the ergos of this bike. I Have some back probs. Im hoping someone has ridden a cbr 600f4i and this bike. My last bike was a cbr f4i, the reason I chose this bike was because of the more upright and less aggressive ergos of sportbikes. It was pretty comfortable however after an hr of riding my back would ache and id feel it the next day. So I like to know how these 2 bikes compare Im assuming the ergos are very similar, but im hoping the zzr is even more upright. So any input would be appreciated thnks. Oh I havent been able to sit on one or take one for a test drive, none in my area so far.