STEERING SYSTEM FOR SADDLE-RIDING TYPE VEHICLE, AND MOTORCYCLE EQUIPPED WITH THE SAME

PROBLEM TO BE SOLVED: To provide a steering system for a saddle-riding type vehicle that achieves appropriate auxiliary force (steering auxiliary force) with respect to operation of a steering handle in a stop state of a saddle-riding type vehicle.SOLUTION: The steering system for a saddle-riding type vehicle has the following configuration. An auxiliary-force control part is configured to set auxiliary force, generated by an electric motor, of a power assist part that applies the auxiliary force to operating force imparted to a steering handle 18. In a low vehicle speed region of a saddle-riding type vehicle, the auxiliary-force control part sets the auxiliary force so as to include the maximum value of the auxiliary force. In a high vehicle speed region higher than the low vehicle speed region, the auxiliary-force control part sets the auxiliary force so as to include the minimum value of the auxiliary force. In a halt state, the auxiliary-force control part sets an intermediate value between the maximum value of the auxiliary force and the minimum value of the auxiliary force. Consequently, it is possible to impart appropriate auxiliary force in the halt state of the saddle-riding type vehicle.