BMW R4 Series 3
1934Allround

BMW R4 Series 3

Key specifications

Engine
398 cc
Power
14 HP
Fuel type
petrol
Fuel capacity
3.2 L
Front brakes
Expanding brake (drum brake)
Rear brakes
Expanding brake (drum brake)

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)