Quote Originally Posted by Kalex-moto View Post
what is the minimum to make a bike road legal for the US? any hints?
Pass the emissions requirements and all you pretty much need are head lights (must always be on), red brake/tail lights, amber turn signals (there are some rules on their placement, but nothing too extreme), horn, mirrors, and noise regulations (basically no open pipes).

There are ways around the emissions requirements if the bike is sold has a "custom". But it shouldn't be too hard to pass the emissions requirements, aprilia has already done much of the hardwork.