Because it made me realise how good the BM is.
I really like the look of the Z and given that the base bike is a modern z900 I expected it to be very good dynamically. I reality it felt unsophisticated, cheap and "old".
The clutch is very light, which I guess some may like, but to me it just removed any feel making me feel like a learner driver each time I was pulling away, I guess it's something you'd get used to and after an hour I was better but still not perfect.
I know this bike doesn't have a QS but that's no excuse for a gear change which felt "agriciltural" at best. OK in the upper gears but using 1-3 around town was a chore and something I'd avoid.
Worse still was a power delivery which resulted in the feeling that the driveline had masses of backlash. Back off the throttle (like when entering a bend ) then ease it back on results in nothing for an instant followed by the power coming in with a bang which then upset the handling. I'm not sure that would reduce with practice, but why should I have to? I didn't with the BM.
In short a bit (lot) dissapointing as I like the looks of the bike but equally put a smile on my face when I got back on mine.