
BMW R4 Series 3
Key specifications
Overview
### Discover the 1934 BMW R4 Series 3: A Timeless Classic Step back in time to the roaring thirties, where the 1934 BMW R4 Series 3 emerged as a distinctive figure in the realm of all-round motorcycles. Designed for the discerning rider who craved both performance and versatility, the R4 Series 3 encapsulated BMW's commitment to engineering excellence. With its blend of classic aesthetics and robust functionality, this motorcycle appealed to a generation of motorcyclists eager to explore the open road and experience the thrill of two-wheeled freedom. At the heart of the R4 Series 3 lies a spirited 398cc single-cylinder, four-stroke engine that delivers a respectable 14 horsepower at 4,000 RPM. Riders can expect a top speed of 100 km/h (62.1 mph), a respectable figure for its era, allowing for exhilarating journeys on winding country roads. With a compression ratio of 5.7:1 and a finely-tuned carburettor fueling the machine, the engine provides a smooth and reliable ride, enhanced further by its air-cooling system. The shaft drive (cardan) ensures minimal maintenance while delivering power seamlessly to the rear wheel, making the R4 a joy to handle, whether navigating city streets or embarking on longer adventures. What sets the BMW R4 Series 3 apart are its meticulously designed features that combine both practicality and elegance. The pressed steel duplex frame provides a solid foundation, while the cartridge front suspension and rigid rear suspension offer a balanced ride, even on less-than-perfect roads. The drum brakes, with a uniform diameter of 180 mm, provide dependable stopping power to match its spirited performance. And with a fuel capacity of 12 liters (3.17 gallons) and an impressive fuel consumption rate of 3.50 liters per 100 km (67.21 mpg), the R4 Series 3 is perfect for long-distance rides without frequent stops at the pump. ####
Pros
Cons
- Classic Design: The R4 Series 3 showcases the timeless style that makes vintage motorcycles so appealing, with elegant lines and a refined aesthetic.
- Durable Engine: The single-cylinder engine is known for its reliability and ease of maintenance, making it a great choice for both enthusiasts and collectors.
- Fuel Efficiency: With impressive fuel consumption figures, this motorcycle allows riders to cover long distances without frequent refueling.
- Limited Power: While adequate for casual rides, the 14 HP output may feel underwhelming for those seeking a more aggressive performance.
- Basic Suspension: The rigid rear suspension might not provide the comfort expected on prolonged journeys over rough terrain.
- Kick Start Only: The absence of an electric starter limits convenience, especially for those accustomed to modern motorcycles.
Technical details
Source specification data
- Make
- BMW
- Model
- R4 Series 3
- Category
- Allround
- Starter
- Kick
- Carrying Capacity
- 200kg
- Power
- 14.00 HP (10.2 kW)) @ 4000 RPM
- Clutch
- Dry-single plate-cable operated
- Top Speed
- 100.0 km/h (62.1 mph)
- Fuel System
- Carburettor
- Bore X Stroke
- 84.0 x 78.0 mm (3.3 x 3.1 inches)
- Compression
- 5.7:1
- Displacement
- 398.00 ccm (24.29 cubic inches)
- Cooling System
- Air
- Engine Details
- Single cylinder, four-stroke
- Fuel Consumption
- 3.50 litres/100 km (28.6 km/l or 67.21 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
- 850 mm (33.5 inches)
- Overall Height
- 950 mm (37.4 inches)
- Overall Length
- 1,980 mm (78.0 inches)
- Weight Incl Oil Gas Etc
- 137.0 kg (302.0 pounds)
- Seat
- Solo seat with springs
- Rear Tyre
- 3.50-26.00
- Frame Type
- Pressed steel duplex
- Front Tyre
- 3.50-26.00
- Rear Brakes
- Expanding brake (drum brake)
- Front Brakes
- Expanding brake (drum brake)
- Rear Suspension
- Rigid
- Front Suspension
- Cartridge
- Rear Brakes Diameter
- 180 mm (7.1 inches)
- Front Brakes Diameter
- 180 mm (7.1 inches)