Freewheel, a lot of them have been disabled by now, ask about it.
Which carb is on it? Does it have automatic or manual choke? Does it work?
Brakes can be a little finicky, should stop straight under decently hard braking (even when everything is working they don't stop awesome - the tires are as wide as a deck of cards....)
Check all the rubber sealing around the windows and such, they can be hard to find.