(b) A person shall ride upon a motorcycle only while  sitting  astride
the  seat,  facing forward, with one leg on each side of the motorcycle,
unless said person is seated in a sidecar affixed to said motorcycle.
  (c) 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) 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.
Structure New York Laws