I'm 31 and I can't sit hunched over on a sport bike for more than about 20 minutes before it starts getting uncomfortable. Maybe if I were 21 I'd do it. But all I could have afforded when I was 21 would have been a little 250, which kind of defeats the purpose of getting a sport bike like that.
Still can't believe people used to take 100 cc bikes on highways. I keep trying to imagine a scooter out on 66 or 495.