Would a motorized bike be as street legal as a regular BIKE?

I am looking for a street legal motorized bike or moped that i do not need a license for. i live in montana just in case of diffe?

• just as above. a bike with a motor i can drive on the street without a liscense.

• Answer:

  Montana requires mopeds to be registered and a drivers license. You can register pocket rockets there. These motor vehicles can't have more than a 40 inch wheel base and 10 inch diameter wheels. They must also be made by a certified manufacturer. You may try using Montana's kit vehicle laws but these normally apply to motorcycles and cars. Kit vehicles must also be registered as well. According to Montana law 61-8-102(2)(b)(ii) as long as the bicycle uses an engine under 50cc and has an automatic transmission system (no manual clutch and/or the operator doesn't manually shift multiple engine driven gears) then its just considered a bicycle.