A passenger on a two- or three-wheeled motorcycle must be: Question A passenger on a two- or three-wheeled motorcycle must be: Answers At least five years old. A licensed driver. At least 18 years old. Happy. Explanation Any passenger carried on a two- or three-wheeled motorcycle in Washington State must be at least five years old. Passengers must have a seat, footboards or pegs, and a DOT-compliant helmet.
