I'm also thinking that the high-strung nature of a 250 inline 4 like the Bandit would not be the best choice for teaching new riders and that a twin or single of some sort would be a better choice.
They'd learn pretty quickly to respect the throttle.
(Ok,.. I'm a bad person.)
They are also likely like the B4 in that they are top heavy. That tends to make it easy for the bike to get away from them, especially when moving it around in a parking lot. I must have dropped Dita 3 times because of that. The one time. she just leaned over, and try as I might, I ended up sliding toward her, and ended up in a heap on top of her.
That said, I had an instructor mention to me once that Dita was an excellent bike to learn on, because she wouldn't let me have many bad habits. I do believe that was right.