The BMW R1150GS and R1150GS Adventure are motorcycles that were manufactured by BMW Motorrad from 1999 through 2004. There was a limited run of 2005-06 model year R1150GSA models as well. The R1150GS models are part of the BMW GS family of dual-sport or adventure motorcycles that have been produced from 1981 to the present date. The bikes have a 1,130 cc horizontally opposed flat-twin engine and shaft drive.