I have decided that it is just not possible to turn a bicycle into a motorcycle, legally. So I need the Legal motor size for a moped in the state of Washington. And what else do I need to know? Is there a certain kind of tire required? I intend to build a long cargo bike with a big enough motor to climb our steep hills, and carry things like ladders. And put some good hydrolic brakes on it,to stop at 30mph. What kind of head light is required? and where can I get brake and turning lights...well may be I just end to go to a moped shop.