
BMW R57
Key specifications
Overview
Introducing the 1928 BMW R57, a motorcycle that stands as a testament to the innovative spirit of the era while establishing BMW's reputation as a manufacturer of high-quality, reliable bikes. Positioned as an all-rounder, the R57 was designed to be both versatile and fun, appealing to the growing community of motorcycle enthusiasts in the late 1920s. Its classic lines and robust engineering encapsulate the essence of early 20th-century motoring, making it not just a mode of transport but a symbol of freedom and adventure. Underneath its timeless frame lies a powerful 494cc two-cylinder boxer engine, renowned for its smooth operation and distinctive sound. Generating 17.95 horsepower at 4,000 RPM, the R57 can reach a top speed of 115 km/h (71.5 mph), making it a swift companion for both urban commuting and weekend excursions. The air-cooled engine is paired with a reliable 24mm Bing carburettor, ensuring optimal fuel delivery and efficiency. With a commendable fuel consumption rate of 4.20 litres per 100 km, this motorcycle allows riders to enjoy long journeys without frequent stops at the pump, embodying the spirit of exploration that defined the era. The R57 is equipped with several features that enhance its riding experience. Its steel double cradle frame provides stability and strength, while the leading-link front suspension and long swingarm with oil pressure shocks at the rear ensure a comfortable ride over varied terrains. The drum brakes at both ends, each with a diameter of 200mm, provide adequate stopping power, making this vintage bike a reliable choice for its time. With a dry single-plate clutch and a shaft drive system, the R57 offers a smooth and responsive ride, embodying the engineering prowess of early BMW motorcycles. **
Pros
- Iconic Design: The classic aesthetics and engineering charm make it a collectible piece for enthusiasts.
- Smooth Performance: The boxer engine delivers a unique riding experience with excellent balance and stability.
- Fuel Efficiency: An impressive fuel consumption rate allows for longer rides with fewer stops.
Cons
- Limited Power: While adequate for its time, modern performance standards may find the power output less thrilling.
- Drum Brakes: The braking system, although effective for its era, may feel inadequate compared to contemporary disc brakes.
- Kick Start Only: The absence of an electric starter may be a challenge for some riders, particularly in colder conditions.
Technical details
Source specification data
- Make
- BMW
- Model
- R57
- Category
- Allround
- Starter
- Kick
- Carrying Capacity
- 360kg-with sidecar 600kg
- Power
- 17.95 HP (13.1 kW)) @ 4000 RPM
- Clutch
- Dry-single plate-cable operated
- Top Speed
- 115.0 km/h (71.5 mph)
- Fuel System
- Carburettor. 24mm Bing
- Compression
- 5.8:1
- Displacement
- 494.00 ccm (30.14 cubic inches)
- Cooling System
- Air
- Engine Details
- Two cylinder boxer, four-stroke
- Fuel Consumption
- 4.20 litres/100 km (23.8 km/l or 56.00 mpg)
- Greenhouse Gases
- O2
- g/km. (
- O2
- -
- Carbon
- dioxide emission)
- Lubrication System
- Wet sump
- Transmission Type Final Drive
- Shaft drive (cardan)
- Fuel Capacity
- 12.00 litres (3.17 gallons)
- Overall Width
- 800 mm (31.5 inches)
- Overall Height
- 950 mm (37.4 inches)
- Overall Length
- 2,100 mm (82.7 inches)
- Weight Incl Oil Gas Etc
- 195.0 kg (429.9 pounds)
- Seat
- Single seat
- Rear Tyre
- 3.50-26.00
- Frame Type
- Steel doble cradle
- Front Tyre
- 3.50-26.00
- Rear Brakes
- Expanding brake (drum brake)
- Front Brakes
- Expanding brake (drum brake)
- Rear Suspension
- Long swingarm-oil pressure shocks
- Front Suspension
- Leading link
- Rear Brakes Diameter
- 200 mm (7.9 inches)
- Front Brakes Diameter
- 200 mm (7.9 inches)