
BMW R57
Key specifications
Overview
Introducing the 1929 BMW R57, a remarkable piece of motorcycle history that embodies the spirit of early 20th-century engineering excellence. Positioned as an all-rounder, the R57 was BMW's entry into a competitive market, delivering a blend of performance, comfort, and reliability that was hard to match. With its distinctive boxer engine and classic styling, this motorcycle appeals not only to collectors but also to those who appreciate the artistry and craftsmanship of vintage machines. The R57’s heritage is interwoven with the narrative of BMW’s pioneering spirit, making it a coveted choice for enthusiasts seeking to own a piece of motorcycling lore. Under the tank of the R57 lies a robust 494cc two-cylinder boxer engine, a configuration that has become synonymous with BMW's design philosophy. Producing 17.95 horsepower at 4000 RPM, this four-stroke powerhouse delivers a top speed of 115 km/h (71.5 mph), allowing riders to cruise comfortably on highways or tackle winding backroads. The engine's air-cooled design and classical 5.8:1 compression ratio ensure reliability, while the 24mm Bing carburetor contributes to efficient fuel delivery. With a commendable fuel consumption of just 4.20 litres per 100 km, riders can enjoy long journeys without the constant worry of refueling, making the R57 not just a beautiful machine, but a practical one too. The R57 is not just about its engine; it features a well-engineered chassis and suspension system that enhances ride quality. The steel double cradle frame provides strength and stability, while the leading link front suspension, combined with a long swingarm and oil pressure shocks at the rear, offers a smooth and controlled ride over various terrains. Coupled with drum brakes—200 mm in diameter both front and rear—the R57 ensures confident stopping power, a critical aspect for any motorcycle of its era. The kick starter adds a touch of nostalgia, allowing riders to engage with their machine in a way that modern push-button starts simply can't replicate. **
Pros
- Iconic Design: The classic styling and boxer engine configuration make the R57 a standout in any collection.
- Fuel Efficiency: With a fuel consumption rate of 4.20 litres/100 km, it’s an economical choice for vintage touring.
- Smooth Ride: The leading link front suspension and long swingarm design provide exceptional ride comfort.
Cons
- Limited Power: With just under 18 HP, it may struggle to keep up with modern traffic conditions.
- Kick Start Only: The absence of an electric starter may be a challenge for some riders, especially in cold weather.
- Maintenance Needs: As a vintage motorcycle, it requires regular and often meticulous maintenance to keep it in prime condition.
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)
- 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)