[The Atomic Ass]

Originally Posted by Ryland

If you want to head out on the interstate you legally are going to need a 250cc engine or larger, if you want to a larger engine like that I would look at one of the fuel injected 250cc motorcycles that just came out in the past year or so, or get a 250cc vespa engine that is fuel injected.

Actually, in most places the highway minimum is 125cc.

I will still +1 the 250 motor idea, though. 800# is going to be tough enough to pull along with a 250 from a stop, (you can forget about pedaling to speed unless you're Lance Armstrong), although 500# won't be quite as bad. My Ninja and I weigh in around 450-500# loaded, and I've cargo-carried in the 700# range before.