[almost40]

The 250 is fun at ALL tracks. Dont let the closing speed thing fool ya. If you keep your line, its the other guys job to get around. You shouldnt have to worry about getting passed in most novice groups. (its not allowed) Once you get some skill, you will find that most of the guys on the big bikes are slo-pokes in the twisties.
Yeah, they will blow by you on the straights, but you will be able to close the gap without a hitch in the twisty part of the track and maybe even pass them back. Its not about top speed, its about lap times.
Go, have fun, and learn. I know most people will frown at the idea of a 250 at the track, but most of them are the very same people you will pass in the twistys after they blow by you in the straight.
Ive done it repeatedly at my trackdays.