Motorcycle such as a BMW C1 (Fig. 1) meets most requirements for under-served areas. It is affordable, fuel efficient, easy parking, weather resistant and with many other advantages but not safe enough compare to a four wheeler (automobile). A four wheeler is more stable than a two wheeler. The gyro stabilizer is designed to improve the stability of two wheelers for better safety.

Torque is generated by the rotating front road wheel of a two-wheeler (motorcycle) for balance. When the vehicle is traveling too slowly, too little torque is generated for adequate balance and when the vehicle is traveling too quickly, too much torque is generated for safe maneuvering. A gyro stabilizer for a two-wheeler thus includes a sensor for detecting the angular momentum of the front road wheel. The detected angular momentum is compared to a predetermined optimal angular momentum.

An electric gyro attached to the front fork of the vehicle is driven at a variable speed to generate a compensating angular momentum equal to the difference between the optimal angular momentum and the angular momentum of the road wheel (Fig. 2).

When the angular momentum of the road wheel is below the optimum, the gyro is driven the same direction as the road wheel to provide supplemental momentum, so that the sum of their momentum is equal to the optimal angular momentum.

When the angular momentum of the road wheel exceeds the optimum, the gyro is driven in the opposite direction as the road wheel to provide a counteracting momentum, so that the sum of their momentum is still equal to the optimal angular momentum (Fig. 3).

Thus the combination of the road wheel and gyro is always optimized for the best stability and steering response throughout the entire speed range of the motorcycle.

For high speed racers, this skill can be applied to both the front and rear wheels for the best system stability. With the generated supplemental angular momentum by the gyro, the motorcycle is able to be balanced at stop.

The manufacture of the gyro (a pancake motor) and controller are trivial.

Gyro stabilizer can be global add-on or built in for motorcycle (two wheeler) manufactures.