Back to Bike FinderYears: 1962 · 1961 · 1960
BMW R50 OS
1961Allround

BMW R50 OS

Key specifications

Engine
494 cc
Power
35 HP
Fuel type
petrol
Fuel capacity
6.3 L
Transmission
4-speed
Front brakes
Expanding brake (drum brake). Duplex full hub
Rear brakes
Expanding brake (drum brake). Simplex full hub

Overview

Introducing the 1961 BMW R50 OS: A Classic Allrounder The 1961 BMW R50 OS stands as a testament to the legendary German engineering that shaped the motorcycle landscape in the mid-20th century. Positioned as an allround motorcycle, it was designed to cater to both the casual rider and the enthusiast seeking adventure. With its iconic boxer engine and a silhouette that exudes vintage charm, the R50 OS is not just a motorcycle; it’s a piece of history, embodying the spirit of freedom on two wheels. Whether navigating winding country roads or cruising through city streets, this classic machine offers a blend of performance and practicality that remains appealing to riders of all backgrounds. At the heart of the R50 OS is its robust 494cc two-cylinder boxer engine, a configuration that not only provides a unique aesthetic but also delivers a thrilling ride. Producing 35 horsepower at a commendable 7,650 RPM, the engine’s performance is characterized by smooth power delivery and impressive torque. Riders can expect a top speed of 160 km/h (99.4 mph), making it a capable choice for both leisurely rides and spirited outings. The air-cooled engine features a 9.5:1 compression ratio, which, coupled with a carburettor system from Bing, ensures efficient fuel consumption of just 5.10 litres per 100 km (46.12 mpg). This combination of performance and efficiency enhances the riding experience, providing ample excitement without the constant worry of refueling. The R50 OS is packed with features that reflect the technology of its time while offering a straightforward ride. Its steel double cradle frame offers durability and stability, complemented by a cartridge front suspension that ensures a smooth journey over uneven surfaces. The drum brakes, both front and rear, provide reliable stopping power, while the shaft drive system adds to the motorcycle’s low-maintenance appeal. Weighing in at 198 kg (436.5 pounds), the R50 OS strikes a balance between heft and maneuverability, making it suitable for both new riders and seasoned veterans. With a fuel capacity of 24 litres (6.34 gallons), long rides are made achievable with fewer stops, allowing riders to fully embrace the joy of the open road. **

Pros

    Cons

    • Iconic Engine Design: The boxer engine not only provides a distinctive aesthetic but also enhances stability and low center of gravity while riding.
    • Excellent Fuel Efficiency: With a consumption rate of 5.10 litres per 100 km, the R50 OS is economical for long-distance touring.
    • Durable Construction: The steel double cradle frame coupled with a reliable shaft drive system means less maintenance and greater longevity.
    • Limited Top Speed: While capable, the top speed of 160 km/h may not satisfy riders seeking more exhilarating performance.
    • Weight Considerations: At 198 kg, it might feel heavy for novice riders or those looking for a lightweight, nimble motorcycle.
    • Kick Start Only: The absence of an electric starter may deter some riders who prefer the convenience of modern starting systems.

    Technical details

    Source specification data

    Make
    BMW
    Model
    R50 OS
    Category
    Allround
    Starter
    Kick
    Power
    35.00 HP (25.5 kW)) @ 7650 RPM
    Clutch
    Dry-single plate-cable operated
    Gearbox
    4-speed
    Ignition
    Magneto
    Top Speed
    160.0 km/h (99.4 mph)
    Fuel System
    Carburettor. Bing
    Bore X Stroke
    68.0 x 68.0 mm (2.7 x 2.7 inches)
    Compression
    9.5:1
    Displacement
    494.00 ccm (30.14 cubic inches)
    Cooling System
    Air
    Engine Details
    Two cylinder boxer, four-stroke
    Fuel Consumption
    5.10 litres/100 km (19.6 km/l or 46.12 mpg)
    Greenhouse Gases
    O2
    g/km. (
    O2
    -
    Carbon
    dioxide emission)
    Lubrication System
    Wet sump
    Transmission Type Final Drive
    Shaft drive (cardan)
    Fuel Capacity
    24.00 litres (6.34 gallons)
    Overall Width
    660 mm (26.0 inches)
    Overall Height
    980 mm (38.6 inches)
    Overall Length
    2,125 mm (83.7 inches)
    Weight Incl Oil Gas Etc
    198.0 kg (436.5 pounds)
    Seat
    Dual seat
    Rear Tyre
    3.50-18.00
    Frame Type
    Steel doble cradle
    Front Tyre
    3.50-18.00
    Rear Brakes
    Expanding
    brake (drum brake).
    Simplex
    full hub
    Front Brakes
    Expanding
    brake (drum brake).
    Duplex
    full hub
    Rear Suspension
    Twin shock-Swingarm
    Front Suspension
    Cartridge
    Rear Brakes Diameter
    200 mm (7.9 inches)
    Front Brakes Diameter
    200 mm (7.9 inches)