Electric speed variator for motorcycle

The utility model relates to an electric speed variator for a motorcycle, being an auxiliary device added on the basis of the existing motorcycle. The utility model is designed for the problems that the existing motorcycle has difficult gear shifting to riders with disabled feet, a shifting fork and a rule plate are deformed by the nonuniform force applying size when the existing motorcycle is carried out with speed variation, etc. The utility model comprises a speed-variation rod arranged on a change-speed shaft and provided with a spacing rod and a direct current motor fixed on a housing of an engine and provided with a gear, one end of the speed-variation rod is a fan-shaped rack, and a power supply and a switch accomplishing the positive and negative-pole exchanging function of electric current are arranged on handle bars. The switch is toggled forwards or backwards, the motor is rotated clockwise or anticlockwise, the speed-variation rod provided with the fan-shaped rack is driven to move, and then the utility model accomplishes speed variation.