Abstract: A handlegrip cruise assist device is formed of a single piece of stiff resilient material, having a circular segment which is shaped circularly so as to grip the outer end of the throttle handlegrip, and a lever segment which extends beneath the heel of the palm and adjoining wrist of the operator with his hand in the normal operating position on the throttle handlegrip. The application of downward pressure on the lever segment from the palm and the adjoining wrist of the throttle hand neutralizes the return force of the carburetor return-to-idle springs, permitting the operator to maintain a constant throttle opening without having to grasp the throttle handlegrip. The circular segment is of a diameter slightly less than the diameter of a complete circle.