H2 Kawsakis were funny when road raced. I watched a friend accelerate out of a corner on Winton Raceway, The bike just whipped around and shot him over the front. I used to race against them with my 500cc Triton. - Because they were so dangerous, I could always stay with them. A Z900 was a different story. On a tight circuit, they would pass me on the straights, then I might enter the next corner going too fast behind them. With drum brakes, braking mid-corner is difficult.
The power-band of my Seeley 850 is super smooth - I can accelerate everywhere on Winton Raceway - even all the way around corners without thinking.