Abstract: A lever and stabilizer bar assembly, attached to the rear suspension system of a standard motorcycle, offsets the lower end of the rear shock from the standard lower shock mount on the swing arm. The leverage of the stabilizer bar and lever arm assembly increases the maximum vertical travel of the rear wheel and provides progressive resistance to rear wheel travel caused by loading of the suspension. The assembly is adjustable for attachment to any standard motorcycle without cutting or welding the frame. Nylon bushings incorporated in pivot mounts between the lever arm and stabilizer bar, and between the assembly and motorcycle frame augment damping and decrease loading of the shocks.