This workshop service and repair manual is dedicated to the R51/3, R67, and R67/2 motorcycle models, produced between 1950 and 1956 in Munich, Germany. These iconic machines represent a robust post-WWII return to motorcycle manufacturing, characterized by their air-cooled, horizontally opposed twin-cylinder (Boxer) engines, typically featuring overhead valve cylinder heads and a 4-speed manual gearbox. The R51/3, with its 494 cc engine producing approximately 24 hp, and the R67 and R67/2, featuring 590 cc engines with power outputs of approximately 28 hp and 35 hp respectively, are renowned for their engineering quality and enduring reliability. These classic boxers, with their distinctive Earles fork front suspension and shaft drive, are highly collectible and often recognized for their historical significance.

This comprehensive manual, presented in German, provides essential guidance for owners, enthusiasts, and mechanics specializing in these vintage motorcycles. It covers all aspects of maintenance, repair, and troubleshooting, from complete engine and gearbox overhauls to detailed procedures for the drivetrain, suspension, brakes, electrical system, and fuel system. With detailed part diagrams, lubrication schedules, fluid specifications, torque values, and ignition timing instructions, this 104-page document is an indispensable resource for preserving the performance and longevity of your R51/3, R67, or R67/2. The manual's extensive coverage ensures that users can effectively perform regular servicing, address common wear items, and undertake complex repairs, thereby saving time and resources.