ALL motorized vehicles have a drivetrain of some sort. The DRIVETRAIN is normally thought to be the method that the vehicle uses to transmit power from the transmission to the rear wheels.
If you mean DRIVESHAFT, then no... Not ALL BMW motorcycles are shaft-driven. The F800 and G/F650 are chain driven.
Several other motorcycles feature shaft-drive, including the 1500 and 1600cc Kawasaki Vulcans, The Honda Gold Wing, the Yamaha Royal Star, and too many others to mention.