I had a 01 FZ1 with the Ivans jet kit and aftermarket exhaust. I passed a coworker one morning on the way home running 154 mph, or at least that's what the speedo showed. I had to get rid of it because I am smart enough to know that I am not responsible enough for that kind of power. It was a great bike, comfortable and a pretty good range as long as you didn't pull that happy stick back too much. I had a FZ6 also but I hated it. You had to keep the revs up before it started making any power and then you were well beyond the speed limit. That's the problem with inline fours, they're not fun riding them unless you're riding them fast.
Thankfully I am old enough (57) to avoid temptation. It's very docile and forgiving if you show the throttle the respect it deserves. If you don't - it will be a short, very fast ride...