The main purpose of this research is to investigate the steering torque influenced by design parameters of two-wheel vehicles. Neglecting other influences by drivers themselves, drivers of two-wheel vehicles control motorcycles mainly by means of the steering torque while driving along a circular path. In addition, the stabilities of motorcycles are not only influenced by steering torque but also the vehicle design and operating parameters. The reaction forces for steady-state cornering can also be obtained. Finally, by using the method to obtain the steering torque, it can be used in early design stage to determine the design parameters of two-wheel vehicles.