Abstract: A brake and pulley assembly for retrofitting onto the hub of a belt driven, swingarm mounted rear wheel of a motorcycle. The hub has a multiplicity of bolt holes therein forming a bolt hole pattern. The hub is mounted to an axle. The brake and pulley assembly consists of a pulley and rotor unit. The pulley is bolted to the hub and the rotor is bolted or otherwise attached to the pulley. A caliper assembly is attached to the swingarm of the motorcycle and provides for frictionally engaging the rotor to slow the motorcycle down.