Seriously old thread, but if you get some time, go to the dyno chart here and see why the fz1 feels different, or faster, in the midrange.
2011 Gentlemen Sportbike Shootout - Motorcycle.com
This idea made it especially tough to set up small two strokes for kids. We respond to steep "increases" on dyno charts. Not so much with charts that are "high", but flat and boring.
But tune a big change around 6000, and kids would be shouting your name out and people woudl start calling asking you to build motors. Sort of like the difference between a 500 mile per hour airplane vs a rollercoaster at 60. One feels fast....
Pro Circuit exhausts did a lot of this. If you coudl go from 3 hp to 15 in 2000 rpm (very possible on a cr80) you got better feedback that going from 6-16 in the same range.
This specific chart shows the point since similar high rpm totals are the same...close, anyway.
Then look at the Suzuki. Low end, and midrange, is WAY above anyone else, yet its beginner friendly, easy to ride power.