Rotor locks have been around for many years and are one of the simplest and quickest ways to add an extra level of security when it comes time to walk away from your bike. There can be a few downsides to rotor locks, the most embarrassing and potentially harmful to you and your bike is forgetting to remove the lock before you ride.
Jaybrake has a great solution to the rotor lock downfalls with the RoadLoK Defender. The RoadLoK Defender is a billet bracket that mounts between the fork leg and caliper and incorporates a hardended stainless steel BrakeBolt locking pin that slides through the rotor locking it in place and preventing the bike from moving. Jaybrake offers the RoadLoK Defender as a bolt-on application for various H-D models from '84-present, '93-present Victory models, as well as many aftermarket rotors. The Defender is available in polish, clear satin anodize, and black satin anodize for $199.95, or chrome for $229.95.