Hexer. In "Grand Theft Auto: The Lost and Damned," Johnny's Hexer is a one-of-a-kind bike with a 2032cc twin cam engine mated to a six-speed gearbox with a chain final drive, according to the game after the first objective. It was constructed by Terry Thorpe and Angus Martin before the events of the tale, and if the original motorbike is lost or destroyed, Clay can provide a replacement one.