Bolt comes with a trick-looking two-into-one exhaust system, which includes an oxygen sensor and exhaust gas catalyst that works with the closed-loop fuel injection system.

FORBES: 2014 Star Bolt: New Motorcycle Test Ride And Review

Some of the avatars have a sensor that activates the messages when someone is close by, others repeat their pre-programmed speeches on a loop.

BBC: Airport avatars offer travel advice