✦ Published
BMW R 51 2
1950
1950
The 1950 BMW R 51/2 represents a pivotal moment in BMW Motorrad's post-war resurgence. Following the R 51, this iteration was a crucial step in re-establishing BMW's motorcycle production. It maintained the classic boxer twin layout that would become synonymous with the brand, directly competing with other premium European manufacturers of the era, such as the Vincent Rapide and the Triumph Thunderbird, which also offered robust touring and performance capabilities.
At its heart, the R 51/2 featured a 494.0 ccm (30.14 cubic inches) two-cylinder boxer, four-stroke engine. This robust powerplant produced 24.1 HP (17.6 kW) at 5600 RPM, a respectable figure for its time. This power allowed the R 51/2 to achieve a top speed of 135.0 km/h (83.9 mph), making it a capable machine for both daily commutes and longer journeys. The fuel tank held 14.00 litres (3.70 US gallons), providing a decent range for extended rides without frequent stops.
Riding characteristics of the R 51/2 emphasized stability and comfort, as was typical for BMWs of this period. The rigid frame and plunger rear suspension, coupled with the telescopic front forks, provided a predictable and composed ride. The upright riding position and broad handlebars contributed to an ergonomic setup that minimized rider fatigue on longer trips. While not a sport bike, its handling was confidence-inspiring, allowing riders to enjoy winding roads with a sense of control.
The BMW R 51/2 was primarily aimed at riders seeking a reliable, well-engineered, and comfortable motorcycle for touring and general transportation. Its robust construction and proven engine design appealed to those who valued durability and German engineering. Owners appreciated its smooth power delivery and the distinctive boxer engine note. For enthusiasts and collectors today, the R 51/2 is a cherished piece of motorcycling history, embodying the resilience and innovation that defined BMW's post-war revival.
✅ Why buy this bike?
• Iconic post-war design, representing BMW's return to motorcycle production with historical significance. • Shaft drive offers superior reliability and less maintenance compared to chain drives of the era. • Horizontally opposed twin engine provides excellent balance and a smooth, distinctive power delivery. • Robust build quality and engineering ensure surprising durability for a 70-year-old machine. • High collectibility and strong appreciation potential for a well-preserved or restored example. • Relatively simple mechanicals make it feasible for experienced enthusiasts to maintain and repair.⚠️ Things to consider
• Limited braking performance by modern standards, requiring careful anticipation and longer stopping distances. • Low power output (around 24 hp) makes it unsuitable for sustained high-speed highway cruising. • Lack of modern suspension technology results in a firm, often jarring ride over rough roads. • Scarcity and high cost of original replacement parts can make restoration or repair very expensive. • Manual spark advance and basic carburetor require a specific starting procedure and regular tuning.The BMW R 51 2 produces 24 HP, fitting A2 license limits (max 35 kW / 47 HP). For riders 18+.
Manufacturer-quoted consumption: 4.10 litres/100 km (24.4 km/l or 57.37 mpg).
⛽ Tank: 14.00 litres (3.70 US gallons)
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