A cooling system for an electric motor of an electric motorcycle is disclosed. The cooling system includes a motorcycle frame including an internal volume, an entrance orifice and an exit orifice. The cooling system further includes an electric motor including an internal volume, a first tubular element connecting the exit orifice with the electric motor and a second tubular element connecting the electric motor with the entrance orifice. The cooling system further includes a liquid coolant located within the internal volume of the frame, the internal volume of the first and second tubular elements and the internal volume of the electric motor. The cooling system further includes a pump for circulating the liquid coolant from the electric motor, through the second tubular element, through the entrance orifice of the frame, through the internal volume of the frame, through the exit orifice of the frame and back to the electric motor.