Yeah, speaking of 550's as we were, I used to own a Kawasaki z550 A3 which was a nice attractive silver finish but as with your comments, unless you screwed the nuts off it it was way under powered by today's standards. Years later I had a Yamaha FZR600 and it was massively faster for very little extra cubic capacity. In fact the FZR was stupidly fast. The z550 would top out at around 115mph whereas the FZR would do way over 125mph.