Although the company started in 1913 as a supplier of airplanes to Germany during World War I, motorcycles form an integral part of BMW's history and were the company's mainstay from 1923 to 1961. This book tells the complete story of these consistently innovative and acclaimed machines, from the boxer twins of the 1920s to the futuristic K-series of the 1980s and 1990s. Detailed technical analysis of all the significant motorcycles combines with a full company history to provide a fascinating and essential read for all BMW and general motorcycle enthusiasts. Written by an acknowledged BMW expert, who is vice president of the BMW Club and has been riding BMWs for over thirty years, this is one of the most complete and up-to-date histories of BMW motorcycles yet available.