
BMW R11 Series 4
Key specifications
Overview
The 1933 BMW R11 Series 4 stands as a hallmark of the early 20th-century motorcycle revolution, embodying the spirit of all-round versatility and engineering excellence that BMW is famed for. Positioned within the burgeoning motorcycle market of its time, the R11 Series 4 was designed to cater to a variety of riders, from daily commuters to adventure seekers. With its classic styling and robust build, this motorcycle not only represents a significant chapter in BMW's history but also captures the essence of freedom and exploration that motorcycling promises. At the heart of the R11 Series 4 lies a powerful two-cylinder boxer engine with a displacement of 745 cc, delivering a respectable 18 horsepower at 3,400 RPM. This four-stroke powerhouse allows riders to experience a thrilling top speed of 110 km/h (68.4 mph), making the R11 a formidable presence on the roads of its era. The engine's unique design contributes to a balanced and stable ride, while the smooth power delivery and responsive throttle provide an enjoyable experience for both novice and seasoned riders. Coupled with a 3-speed gearbox and a reliable cardan shaft drive, the R11 Series 4 ensures seamless gear transitions and dependable performance under various riding conditions. The craftsmanship of the R11 Series 4 extends beyond its engine performance, showcasing several key features that resonate with motorcycle enthusiasts. The steel double cradle frame ensures structural integrity and durability, while the front plate spring suspension offers an engaging ride quality, absorbing bumps with ease. The expanding drum brakes, complemented by a 200 mm diameter front brake, provide reliable stopping power, enhancing rider confidence on the road. With a fuel capacity of 14 liters, this model encourages long-distance journeys, all while maintaining an efficient fuel consumption rate of 4.5 liters per 100 km, or an impressive 52.27 mpg. **
Pros
- Classic Design: The R11’s timeless styling appeals to vintage motorcycle enthusiasts and collectors alike.
- Reliable Performance: The air-cooled, boxer engine provides a robust balance of power and efficiency for various riding scenarios.
- Durability: The steel double cradle frame and high-quality components ensure longevity and resilience even after decades.
Cons
- Limited Speed: While adequate for its time, the top speed of 110 km/h may not satisfy modern riders seeking adrenaline-fueled performance.
- Heavier Weight: At 162 kg (357 lbs), the R11 may feel cumbersome for novice riders, especially during slow maneuvers.
- Basic Technology: The absence of contemporary features like disc brakes and advanced suspension systems may not meet the expectations of today's riders.
Technical details
Source specification data
- Make
- BMW
- Model
- R11 Series 4
- Category
- Allround
- Starter
- Kick
- Carrying Capacity
- 210kg
- Power
- 18.00 HP (13.1 kW)) @ 3400 RPM
- Clutch
- Two plates-dry
- Gearbox
- 3-speed
- Ignition
- Magneto
- Top Speed
- 110.0 km/h (68.4 mph)
- Fuel System
- Carburettor. 24mm Amal
- Bore X Stroke
- 78.0 x 78.0 mm (3.1 x 3.1 inches)
- Compression
- 5.5:1
- Displacement
- 745.00 ccm (45.46 cubic inches)
- Cooling System
- Air
- Engine Details
- Two cylinder boxer, four-stroke
- Fuel Consumption
- 4.50 litres/100 km (22.2 km/l or 52.27 mpg)
- Greenhouse Gases
- O2
- g/km. (
- O2
- -
- Carbon
- dioxide emission)
- Lubrication System
- Forced feed
- Transmission Type Final Drive
- Shaft drive (cardan)
- Fuel Capacity
- 14.00 litres (3.70 gallons)
- Overall Width
- 890 mm (35.0 inches)
- Overall Height
- 940 mm (37.0 inches)
- Overall Length
- 2,100 mm (82.7 inches)
- Weight Incl Oil Gas Etc
- 162.0 kg (357.1 pounds)
- Rear Tyre
- 3.50-26.00
- Frame Type
- Steel-double cradlel
- Front Tyre
- 3.50-26.00
- Front Brakes
- Expanding brake (drum brake)
- Rear Suspension
- Rigid
- Front Suspension
- Plate springe
- Rear Brakes Diameter
- 55 mm (2.2 inches)
- Front Brakes Diameter
- 200 mm (7.9 inches)