Back to Bike FinderYears: 1954 · 1953 · 1952 · 1951
BMW R51 3
1951Allround

BMW R51 3

Key specifications

Engine
494 cc
Power
24 HP
Fuel type
petrol
Fuel capacity
4.5 L
Transmission
4-speed
Front brakes
Expanding brake (drum brake). Duplex
Rear brakes
Expanding brake (drum brake). Simplex

Overview

Introducing the 1951 BMW R51 3, a classic motorcycle that seamlessly blends timeless design with innovative engineering of its era. Positioned as an allrounder, the R51 3 exemplifies BMW's commitment to quality and performance, making it a sought-after gem among collectors and riding enthusiasts alike. With its distinct boxer engine configuration and robust construction, this motorcycle not only pays homage to BMW's rich heritage but also provides a thrilling ride that stands the test of time. At the heart of the R51 3 lies a powerful 494cc two-cylinder boxer engine, delivering an impressive 24.07 horsepower at 5800 RPM. This four-stroke powerhouse is known for its unique character and smooth power delivery, making it a joy to ride on winding roads or cruising at a top speed of 135 km/h (83.9 mph). The air-cooled engine, combined with a 4-speed gearbox and shaft drive, ensures a reliable and engaging riding experience, while its fuel efficiency of 4.50 litres per 100 km (52.27 mpg) allows for extended journeys with fewer stops at the pump. The balanced bore and stroke measurement of 68mm x 68mm highlights BMW's dedication to engineering excellence, creating a harmonious blend of torque and power. The R51 3 is equipped with features that speak to its era while remaining functional for modern enthusiasts. Its steel single cradle frame provides stability and strength, complemented by telescopic rear suspension and cartridge front suspension for a smooth ride over various terrains. The dual 200mm drum brakes (expanding type) deliver reliable stopping power, ensuring confidence during spirited rides. A kick starter adds a nostalgic touch, reminding riders of the simpler times in motorcycling. With a fuel capacity of 17 liters, the R51 3 is designed for adventure, allowing riders to embark on long excursions without the constant worry of refueling. **

Pros

  • Timeless Design: The R51 3 boasts classic aesthetics that appeal to vintage motorcycle enthusiasts.
  • Smooth Engine Performance: The boxer engine offers a unique riding experience with great torque and smooth power delivery.
  • Reliability: Known for its robust build and dependable performance, this motorcycle can handle various riding conditions.

Cons

  • Limited Speed: While capable, its top speed may not satisfy those seeking high-performance thrills.
  • Weight: At 190 kg, it may feel heavy for some riders, especially when maneuvering at low speeds.
  • Maintenance: Parts for older models can be harder to find, potentially making maintenance more challenging for owners.

Technical details

Source specification data

Make
BMW
Model
R51 3
Category
Allround
Starter
Kick
Carrying Capacity
355kg-600kg with sidecar
Power
24.07 HP (17.6 kW)) @ 5800 RPM
Clutch
Dry-single plate-cable operated
Gearbox
4-speed
Top Speed
135.0 km/h (83.9 mph)
Fuel System
Carburettor. 22mm
Bore X Stroke
68.0 x 68.0 mm (2.7 x 2.7 inches)
Compression
6.3:1
Displacement
494.00 ccm (30.14 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
Wet sump
Transmission Type Final Drive
Shaft drive (cardan)
Fuel Capacity
17.00 litres (4.49 gallons)
Overall Width
790 mm (31.1 inches)
Overall Height
985 mm (38.8 inches)
Overall Length
2,130 mm (83.9 inches)
Weight Incl Oil Gas Etc
190.0 kg (418.9 pounds)
Seat
Solo seat with springs
Rear Tyre
3.50-19.00
Frame Type
Steel single cradle
Front Tyre
3.50-19.00
Rear Brakes
Expanding brake (drum brake). Simplex
Front Brakes
Expanding brake (drum brake). Duplex
Rear Suspension
Telscopic
Front Suspension
Cartridge
Rear Brakes Diameter
200 mm (7.9 inches)
Front Brakes Diameter
200 mm (7.9 inches)