(a) Use of seat by operator and passengers.--A person operating a motorcycle shall ride only upon the permanent and regular seat attached to the motorcycle, and the operator shall not carry any other person nor shall any other person ride on a motorcycle unless the motorcycle is designed to carry more than one person, in which event a passenger may ride upon the permanent and regular seat if designed for two persons, or upon another seat firmly attached to the motorcycle at the rear or side of the operator. In no event shall a passenger sit in front of the operator of the motorcycle. (b) Method of seating.--Unless in a sidecar, a person shall ride upon a motorcycle only while sitting astride the seat, facing forward, with one leg on each side of the motorcycle. (c) Articles carried by operator.--No person shall operate a motorcycle while carrying any package, bundle or other article which prevents him from keeping both hands on the handlebars. (d) Interference with operation.--No operator shall carry any person, nor shall any person ride, in a position that will interfere with the operation or control of the motorcycle or the view of the operator.
Pennsylvania Legal Code