Motorcycle security devices fall into two basic categories - motorcycle locks and motorcycle alarms. Motorcycle locks come in various shapes and sizes - disk locks, U-locks, chain locks, cable locks etc, available from brands such as Masterlock, Xena, OnGuard, Kryptonite, or Bully. Most motorcycles don't come equipped with an OEM alarm system, but motorcycle alarms are widely available in the aftermarket. Advanced motorcycle alarm systems (Gorilla motorcycle alarms) work the same way as car alarms. Some manufacturers like Xena make motorcycle security devices that combine a lock and alarm into one (Xena disk lock alarms). Leatherup.com has a large selection of motorcycle security devices, motorcycle locks and motorcycle alarms. We also offer motorcycle accessories and motorcycle parts.