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| BMW R 50/2 | |
|---|---|
| Name | BMW R 50/2 |
| Manufacturer | BMW Motorrad |
| Production | 1955–1960 |
| Class | Standard motorcycle |
| Engine | 494 cc air-cooled flat-twin |
| Power | 26 bhp @ 5,800 rpm |
| Transmission | 4-speed manual |
| Frame | Tubular steel |
| Wheelbase | 1410 mm |
| Dry weight | 190 kg |
BMW R 50/2
The BMW R 50/2 is a mid-1950s touring motorcycle produced by BMW Motorrad in Munich, Bavaria. It combines an air-cooled flat-twin engine configuration developed during the interwar and postwar periods with shaft drive and a duplex frame derived from earlier BMW Motorrad models. The R 50/2 was introduced amid postwar recovery and became notable for durability, long-distance touring use, and influence on later BMW R series motorcycles.
The R 50/2 arrived as part of BMW's 1950s lineup alongside models such as the BMW R 51/3, BMW R 60/2, and BMW R 69S. It reflected BMW's engineering lineage that stretches back to prewar designs influenced by engineers like Max Friz and corporate leaders including Franz Josef Popp. Launched at exhibitions in Munich and sold across markets including United Kingdom, United States, and France, the R 50/2 represented BMW's attempt to blend touring capability with reliability demanded by riders in the European Economic Community era.
Development traces to BMW's interwar and immediate postwar engineering programs, employing the horizontally opposed twin architecture refined by designers such as Fritz Neumeyer and facilities at the BMW Plant Munich. Design priorities included shaft drive durability pioneered earlier by BMW, a pressed steel duplex cradle frame evolved from chassis techniques used by Zündapp and NSU Motorenwerke AG, and telescopic front forks influenced by developments at Telelever predecessors. Styling cues echoed BMW's heritage seen in models ridden by figures like T. E. Lawrence enthusiasts and exhibited alongside marques such as Triumph Motorcycles Ltd and Harley-Davidson at continental shows.
The R 50/2 features a 494 cc air-cooled, four-stroke, overhead valve, horizontally opposed twin producing approximately 26 bhp at 5,800 rpm. Fuel delivery used a Bing carburetor feeding a compression ratio around 7.2:1, timed by a wet sump lubrication system and Bosch ignition components derived from Bosch GmbH developments. Power transmitted via a four-speed manual gearbox to a shaft drive employing a hypoid bevel gear assembly similar in layout to systems used by Shaft Drive pioneers. Braking relied on drum brakes front and rear with wheel diameters compatible with spoke wheels supplied by vendors such as Dunlop and Pirelli; instrumentation used gauges by VDO.
Produced between 1955 and 1960 at the BMW Plant Munich, the R 50/2 underwent incremental changes including upgrades to final drive ratios, carburetor jets for altitude markets, and optional chrome packages sold through dealers like BMW Motorrad USA importers. Variants included touring configurations with panniers and electrical upgrades to support lighting options popular in Scandinavia and the Benelux region. The R 50/2 shared parts commonality with contemporary BMWs such as the BMW R 60/2 and the higher-performance BMW R 69S, facilitating aftermarket customization by firms like HAGON and restoration specialists in West Germany and United Kingdom.
With a top speed in the 160–170 km/h range under ideal conditions, the R 50/2 balanced steady cruising performance with long-term reliability favored by touring riders including members of clubs like the BMW Motorcycle Owners of America. The flat-twin layout produced strong low- and mid-range torque useful on mountain passes such as the Alps routes and coastal roads in California. Handling characteristics combined a relatively long wheelbase and low center of gravity with telescopic front forks, giving stable high-speed behavior but slower turn-in compared with lighter sport motorcycles from AJS or Norton Motorcycles.
While primarily a touring machine, the R 50/2 and related models were campaigned in endurance events and rallies such as the Isle of Man TT era club races, regional reliability trials, and continental long-distance events endorsed by organizations like the Fédération Internationale de Motocyclisme. Privateers and factory-supported riders used modified R 50/2 machines to compete against rivals including BMW R 69S entrants and machines from MV Agusta' teams in hillclimb and time-trial formats. Notable personalities who rode BMW twins in competition contexts encompassed participants from the Classic TT community and veteran riders affiliated with touring clubs in Germany and United Kingdom.
The R 50/2 holds significant collector interest among enthusiasts of postwar European motorcycles, frequently appearing at events like the Goodwood Festival of Speed and classic motorcycle auctions run by houses such as Bonhams and RM Sotheby's. Collectors prize original condition models with factory fittings by BMW Werk. Restoration networks and parts suppliers across Europe and North America support preservation, and the R 50/2's engineering influenced later BMW designs including shaft-driven touring models popularized by riders such as Ewan McGregor and institutions like long-distance touring organizations. Its cultural presence is maintained through clubs including the Vintage BMW Motorcycle Club and exhibitions at museums like the BMW Museum.
Category:BMW motorcycles Category:Motorcycles introduced in 1955