Paul is totally right. Especially if it's set up well, you can learn a lot trying to keep up on the track on an underpowered bike. I've never raced but always got a pretty good rush being 'competitive' on the B4 and even on the F3, which is underpowered compared to most of what shows up at the track for a trackday. I don't know enough about the various race classes to know how the 500 stacks up in a true competitive situation. I do know of some trackday riders that regularly have a blast on the EX500. Regardless of what kind of rider you are on the road, I suspect you'll learn a lot riding either bike on the track. Lastly (and maybe counter to what I said above), if you're a decent rider and take to the track with some common sense, your chances of tossing the Bandit down the track are hardly more than they are on a spirited weekend ride.