A data processing apparatus has a first processing unit for processing an input data, a second processing unit responsive to the data processed by the first processing unit for executing a processing dependent on the data and producing a display data, and a display unit having a display drive unit and a display device for displaying the display data. A surfactant and precursors including a sodium precursor, a phosphate precursor, a transition metal precursor are dissolved in a solvent and stirred for sufficient mixing and reaction. The method further includes the step of analyzing the throttle valve angle, the engine speed or both the throttle valve angle and the engine speed to detect the initiation of the starting process of the motorcycle. Security information is preferably required for a user to gain access to the system. In another embodiment, the grooves extend along the downstream faces of the bristle backing plate.