Abstract: A stand-alone, auxiliary brake system is provided for operating the rear wheel brake of a motorcycle. The auxiliary brake includes an actuator that is connected to a hand lever by a hose. The actuator is mounted to the rear brake using a fastener. A push rod of the actuator is installed onto the rear brake master cylinder replacing the existing push rod. The push rod is attached to a piston, which is mounted inside a cylinder of the actuator. A transfer port on the actuator connects the hose to the cylinder with the fluid inside the hose being pressurized by the hand lever to push the piston to activate the rear brake through the push rod. Thus, the auxiliary brake system provides an efficient and effective braking mechanism through the user's hand actuation without compromising the existing foot pedal braking system.