Depends on your state. In Wyoming it is childishly simple. We don't require any turn signals. So the addition of a speedo, left side mirror, headlight (don't need brights) and brake/tail light with plate illumination and your done. I know a guy who has one registered that doesn't even have a speedo. He has marks on his tach showing the speed (while in 5th gear). He's never gotten a ticket. A word of caution, california, new york and several other states WILL NOT allow a two stroke conversion to be registered for the street at all. Pollution regsdontcha know!.