BMW R47
1927Allround

BMW R47

Key specifications

Engine
494 cc
Power
12 HP
Fuel type
petrol
Transmission
3-speed
Front brakes
Expanding brake (drum brake)

Overview

Introducing the 1927 BMW R47, a timeless classic that embodies the spirit of early motorcycle innovation and German engineering. Positioned as an allrounder in the motorcycle market, the R47 strikes a balance between performance, reliability, and style. As BMW’s foray into the world of touring bikes, it laid the groundwork for future models, showcasing the brand’s commitment to quality and craftsmanship. With its distinguished design and respectable performance, the R47 remains a coveted piece of history for collectors and enthusiasts alike. At the heart of the R47 lies a robust 494cc two-cylinder boxer engine, delivering a respectable 11.96 horsepower at 3,400 RPM. This four-stroke powerhouse is paired with a smooth 3-speed gearbox and a reliable shaft drive, allowing for a top speed of 95 km/h (59 mph) — impressive for its time. Riders will appreciate the air-cooled engine's efficient fuel consumption of just 3.00 litres per 100 km (or an impressive 78.41 mpg). The R47's balanced design, combined with its rigid rear suspension and leading link front suspension, provides a stable and comfortable ride, making it ideal for long-distance journeys through the scenic landscapes of the 1920s. The R47 showcases several key features that reflect the cutting-edge technology of its era. The steel double cradle frame offers both strength and rigidity, while the reliable drum brakes, with a 150mm diameter front brake, ensure dependable stopping power. The use of a dry-single plate clutch, operated by cable, adds a layer of simplicity to the riding experience, making maintenance straightforward. With its kickstarter, the R47 invites riders to embrace the art of motorcycling in its purest form, allowing for a tactile connection with the machine that modern electric starters often lack. **

Pros

  • Timeless Design: The R47's classic aesthetics appeal to vintage motorcycle enthusiasts and collectors.
  • Fuel Efficiency: With a fuel consumption of 3.00 litres per 100 km, it offers remarkable efficiency for long rides.
  • Reliable Performance: The boxer engine and shaft drive contribute to a smooth and stable riding experience.

Cons

  • Limited Power: With just under 12 horsepower, it may struggle to keep up with modern traffic.
  • Rigid Rear Suspension: While historically accurate, the rigid rear suspension may not provide the comfort of contemporary designs.
  • Manual Kickstart: The absence of an electric starter may be challenging for those unaccustomed to traditional starting methods.

Technical details

Source specification data

Make
BMW
Model
R47
Category
Allround
Starter
Kick
Carrying Capacity
188kg
Power
11.96 HP (8.7 kW)) @ 3400 RPM
Clutch
Dry-single plate-cable operated
Gearbox
3-speed
Top Speed
95.0 km/h (59.0 mph)
Fuel System
Carburettor. 20mm BMW Spezial
Bore X Stroke
68.0 x 68.0 mm (2.7 x 2.7 inches)
Compression
4.9:1
Displacement
494.00 ccm (30.14 cubic inches)
Cooling System
Air
Engine Details
Two cylinder boxer, four-stroke
Fuel Consumption
3.00 litres/100 km (33.3 km/l or 78.41 mpg)
Greenhouse Gases
O2
g/km. (
O2
-
Carbon
dioxide emission)
Lubrication System
Wet sump
Transmission Type Final Drive
Shaft drive (cardan)
Overall Width
800 mm (31.5 inches)
Overall Height
950 mm (37.4 inches)
Overall Length
2,100 mm (82.7 inches)
Weight Incl Oil Gas Etc
126.0 kg (277.8 pounds)
Seat
Single seat
Rear Tyre
3.5-26
Frame Type
Steel doble cradle
Front Tyre
3.5-26
Front Brakes
Expanding brake (drum brake)
Rear Suspension
Rigid
Front Suspension
Leading link
Front Brakes Diameter
150 mm (5.9 inches)