A motorcycle, which is equipped with a weapon, as well as with a front and rear wheel or a front ski and a rear-located track mat. The motorcycle includes a chassis member, a front frame, a handlebar, and a pivoting device fitted between the handlebar and the front wheel or ski. The pivoting device includes connecting mechanism including switch-over elements whereby the weapon is connectable to the handlebar for directing it in a lateral direction by turning motions of the handlebar or disconnectable from this engagement with the handlebar to use the handlebar for steering the motorcycle.