BMW R11 Series 2 1931 - Specifications & Review
Article Complete Info
| Articleid | 383918 |
|---|---|
| Category | Allround |
| Make | BMW |
| Model | R11 Series 2 |
| Year | 1931 |
Chassis, Suspension, Brakes & Wheels
| Frametype | Steel-double cradlel |
|---|---|
| Frontbrakes | Expanding brake (drum brake) |
| Frontbrakesdiameter | 200 mm (7.9 inches) |
| Frontsuspension | Plate springe |
| Fronttyre | 3.25-26.00 |
| Rearbrakesdiameter | 55 mm (2.2 inches) |
| Rearsuspension | Rigid |
| Reartyre | 3.25-26.00 |
| Seat | Spring-mounted seat |
Engine & Transmission
| Borexstroke | 78.0 x 78.0 mm (3.1 x 3.1 inches) |
|---|---|
| Clutch | Two plates-dry |
| Compression | 5.5:1 |
| Coolingsystem | Air |
| Displacement | 745.00 ccm (45.46 cubic inches) |
| Enginedetails | Two cylinder boxer, four-stroke |
| Fuelconsumption | 4.50 litres/100 km (22.2 km/l or 52.27 mpg) |
| Fuelsystem | Carburettor. BMW single 24mm |
| Gearbox | 3-speed |
| Greenhousegases | 104.4 CO2 g/km. (CO2 - Carbon dioxide emission) |
| Ignition | Magneto |
| Lubricationsystem | Forced feed |
| Power | 18.00 HP (13.1 kW)) @ 3400 RPM |
| Topspeed | 100.0 km/h (62.1 mph) |
| Transmissiontypefinaldrive | Shaft drive (cardan) |
Other Specifications
| Carryingcapacity | 210kg |
|---|---|
| Starter | Kick |
Physical Measures & Capacities
| Fuelcapacity | 14.00 litres (3.70 gallons) |
|---|---|
| Overallheight | 940 mm (37.0 inches) |
| Overalllength | 2,100 mm (82.7 inches) |
| Overallwidth | 890 mm (35.0 inches) |
| Weightincloilgasetc | 162.0 kg (357.1 pounds) |
About BMW R11 Series 2 1931
Introducing the 1931 BMW R11 Series 2: A Testament to Engineering Excellence
The 1931 BMW R11 Series 2 stands as a landmark in the motorcycle world, epitomizing the blend of robust engineering and pioneering design during the early 20th century. As a member of BMW’s all-rounder category, the R11 Series 2 was aimed at the discerning rider seeking a reliable companion for both urban commuting and longer journeys. With its classic styling and solid construction, this motorcycle not only captures the spirit of its time but also offers a glimpse into the innovative future that BMW would continue to shape.
Engine Performance and Riding Characteristics
At the heart of the R11 Series 2 lies a powerful 745cc two-cylinder boxer engine, delivering a respectable 18 horsepower at 3,400 RPM. This four-stroke marvel is capable of achieving a top speed of 100 km/h (62.1 mph), making it suitable for both leisurely rides and spirited jaunts on the open road. The engine's 5.5:1 compression ratio and a single 24mm carburettor ensure a smooth power delivery, while the shaft drive provides a seamless connection to the rear wheel, reducing maintenance needs and enhancing reliability. Riders will appreciate the combination of a 3-speed gearbox and a two-plate dry clutch, which together create a satisfying and engaging riding experience—one that encourages exploration and adventure.
Key Features and Technology
The R11 Series 2 is not just about raw power; it's also about thoughtful engineering and design. Its steel double cradle frame provides a sturdy foundation, enhancing stability and handling, while the plate spring front suspension offers a comfortable ride over varied terrains. The expanding drum brakes—200 mm in the front and 55 mm in the rear—provide effective stopping power, a vital feature for any motorcycle enthusiast. A kick starter, while a nod to the era's simplicity, remains an iconic touch that connects riders to the roots of motorcycling. With a fuel capacity of 14 liters and an impressive fuel efficiency of approximately 52.27 mpg, the R11 Series 2 is well-equipped for long-distance journeys, making it a practical choice for those who value both style and functionality.
Pros and Cons of the 1931 BMW R11 Series 2
Pros:
- Timeless Design: The classic silhouette and elegant styling make it a head-turner among vintage motorcycle enthusiasts.
- Reliable Performance: The boxer engine offers a robust and steady power delivery, ideal for a variety of riding conditions.
- Low Maintenance: The shaft drive system minimizes wear and tear, allowing for longer rides with fewer interruptions.
Cons:
- Limited Speed: While it performs well for its time, modern riders may find the top speed underwhelming compared to contemporary motorcycles.
- Basic Technology: The mechanical features, while charming, lack the advanced technology found in modern bikes, which may deter some enthusiasts.
- Weight: At 162 kg (357.1 lbs), the R11 Series 2 can feel heavy, especially for novice riders or those accustomed to lighter machines.
In summary, the 1931 BMW R11 Series 2 is a remarkable piece of history, combining engineering prowess with timeless aesthetics. It offers an authentic riding experience that is both enjoyable and steeped in tradition, making it a prized possession for collectors and a joy for riders who appreciate the roots of motorcycling.