The introduction of the power steering will be thought also the motorcycle in the future. It is because of an increase of a large-scale motorcycle in recent years and the possibility for rider's supplementary role by an electric motor. In this research, the authors do the experiment that uses the motorcycle, and examine the steering wheel torque characteristic when the corner running for the electric power steering system. Finally, experimental results indicated that steering torques from the rider are similar at the low speed. It means there are possibility to construct the power steering system for the motorcycles at low speed.