750.227 Concealed weapons; carrying; penalty.
Sec. 227.
(1) A person shall not carry a dagger, dirk, stiletto, a double-edged nonfolding stabbing instrument of any length, or any other dangerous weapon, except a hunting knife adapted and carried as such, concealed on or about his or her person, or whether concealed or otherwise in any vehicle operated or occupied by the person, except in his or her dwelling house, place of business or on other land possessed by the person.
(2) A person shall not carry a pistol concealed on or about his or her person, or, whether concealed or otherwise, in a vehicle operated or occupied by the person, except in his or her dwelling house, place of business, or on other land possessed by the person, without a license to carry the pistol as provided by law and if licensed, shall not carry the pistol in a place or manner inconsistent with any restrictions upon such license.
It does clearly say "in". I still say saying you are "on" a motorbike is an risk without a CPL. Letter of the law perhaps, but good luck convincing a judge of that.