I've been considering getting a 21+ ZX10 as my next race bike, mainly because they are cheap and most all of my Gen 5 parts will fit, but have heard that people have had problems with the electronics. Main things I've heard are the following. Some race teams have had problems tuning out a choppy throttle at low inputs when you're just getting back on the throttle, the bike tends to lunge and is not smooth. Wheelie control either doesn't work or cuts power to the point that it needs to be turned off. The electronics behave differently from weekend to weekend and are just generally inconsistent, for example the TC intervenes sometimes but other times not in the same corner.
I did talk to a few people about this, Corey Alexander and Michael Gilbert both said they've experienced this stuff, Michael said it was bad to the point that they had issues setting up the chassis because it was so inconsistent, Corey said he was able to ride around most of the issues. These are just two examples.
But I've also heard other guys haven't really had any issues, so I'm not really sure what to think. I hear Graves has "solved" the issues, but another fast guy said he tried everything they had and it was all shit (in his words). Any insight would be appreciated.