An electric motorcycle comprising: a hydraulic pump; an oil passage through which oil forcibly fed by the hydraulic pump flows: a hydraulic pressure detecting device (16,23) for detecting a hydraulic pressure in the oil passage; a hydraulic pressure determiner unit for determining whether or not a value of the hydraulic pressure detected by the hydraulic pressure detecting device is less than a first allowable value; a pump state determiner unit for determining whether or not an activation command is output to the hydraulic pump; and a warning output device for outputting a warning signal according to a result of the determination performed by the hydraulic pressure determiner unit and a result of the determination performed by the pump state determiner unit; wherein the warning output device does not output the warning signal when the pump state determiner unit determines that the activation command is not output to the hydraulic pump and the hydraulic pressure determiner unit determines that the value of the hydraulic pressure in the oil passage is less than the first allowable value; and wherein the warning output device outputs the warning signal when the pump state determiner unit determines that the activation command is output to the hydraulic pump and the hydraulic pressure determiner unit determines that the value of the hydraulic pressure in the oil passage is less than the first allowable value. a hydraulic pump; an oil passage through which oil forcibly fed by the hydraulic pump flows: a hydraulic pressure detecting device (16,23) for detecting a hydraulic pressure in the oil passage; a hydraulic pressure determiner unit for determining whether or not a value of the hydraulic pressure detected by the hydraulic pressure detecting device is less than a first allowable value; a pump state determiner unit for determining whether or not an activation command is output to the hydraulic pump; and a warning output device for outputting a warning signal according to a result of the determination performed by the hydraulic pressure determiner unit and a result of the determination performed by the pump state determiner unit; wherein the warning output device does not output the warning signal when the pump state determiner unit determines that the activation command is not output to the hydraulic pump and the hydraulic pressure determiner unit determines that the value of the hydraulic pressure in the oil passage is less than the first allowable value; and wherein the warning output device outputs the warning signal when the pump state determiner unit determines that the activation command is output to the hydraulic pump and the hydraulic pressure determiner unit determines that the value of the hydraulic pressure in the oil passage is less than the first allowable value. a hydraulic pressure detecting device (16,23) for detecting a hydraulic pressure in the oil passage; a hydraulic pressure determiner unit for determining whether or not a value of the hydraulic pressure detected by the hydraulic pressure detecting device is less than a first allowable value; a pump state determiner unit for determining whether or not an activation command is output to the hydraulic pump; and a warning output device for outputting a warning signal according to a result of the determination performed by the hydraulic pressure determiner unit and a result of the determination performed by the pump state determiner unit; wherein the warning output device does not output the warning signal when the pump state determiner unit determines that the activation command is not output to the hydraulic pump and the hydraulic pressure determiner unit determines that the value of the hydraulic pressure in the oil passage is less than the first allowable value; and wherein the warning output device outputs the warning signal when the pump state determiner unit determines that the activation command is output to the hydraulic pump and the hydraulic pressure determiner unit determines that the value of the hydraulic pressure in the oil passage is less than the first allowable value.