Back to Bike FinderYears: 1953 · 1952 · 1951
BMW R25 2
1952Allround

BMW R25 2

Key specifications

Engine
247 cc
Power
12 HP
Fuel type
petrol
Fuel capacity
3.2 L
Transmission
4-speed
Front brakes
Expanding brake (drum brake)
Rear brakes
Expanding brake (drum brake)

Overview

Introducing the 1952 BMW R25/2: A Classic Allrounder The 1952 BMW R25/2 stands as a testament to the timeless appeal of classic motorcycles, exemplifying the perfect blend of style, performance, and practicality. Positioned in the allround category, this bike was designed for riders who craved versatility—whether navigating city streets or cruising along scenic countryside roads. With its elegant lines and distinctive BMW badge, the R25/2 not only caught the eye of enthusiasts but also earned its place in the hearts of motorcyclists seeking reliable transportation during the post-war era. Engine Performance and Riding Characteristics At the heart of the R25/2 lies a robust 247cc single-cylinder, four-stroke engine that produces a respectable 11.96 horsepower at 5600 RPM. This power, coupled with a 4-speed gearbox, translates to a top speed of 80 km/h (49.7 mph)—a thrilling ride for its time. The bike's air-cooled engine features a compression ratio of 6.5:1 and utilizes a Bing carburettor for efficient fuel delivery. Riders will appreciate the R25/2's remarkable fuel efficiency, boasting 2.90 litres per 100 km (81.11 mpg), making it not just a joy to ride but also economical for longer journeys. The smooth power delivery and predictable handling make this motorcycle a delight for both novice and experienced riders alike. Key Features and Technology The R25/2 is built on a sturdy steel single cradle frame, providing a solid foundation for its sophisticated suspension system, which includes a cartridge front suspension and a twin-shock plunger setup at the rear. This design ensures a comfortable ride, absorbing the bumps of uneven roads effectively. The bike is equipped with expanding drum brakes at both the front and rear, featuring a 160 mm diameter, allowing for reliable stopping power. Notably, the R25/2 utilizes a shaft drive (cardan) for smooth power transfer, eliminating the need for chain maintenance and enhancing overall durability. With a kick starter and a fuel capacity of 12 litres, this motorcycle is ready for adventure at a moment's notice. **

Pros

    Cons

    • Exceptional Fuel Efficiency: With an impressive 81.11 mpg, the R25/2 is economical for both daily commutes and longer rides.
    • Reliable Build Quality: BMW's engineering excellence ensures durability and longevity, making it a dependable choice for vintage motorcycle enthusiasts.
    • Smooth Handling: The combination of a well-designed suspension and a shaft drive system provides a comfortable and stable ride experience.
    • Limited Power Output: While suitable for leisurely rides, the 11.96 HP may feel underwhelming for those seeking high-performance thrills.
    • Kick Start Only: The absence of an electric starter can be a challenge for some riders, particularly in cold or awkward situations.
    • Weight Considerations: At 140 kg (308.6 pounds), the R25/2 may not be the lightest option on the market, which could affect maneuverability for less experienced riders.

    Technical details

    Source specification data

    Make
    BMW
    Model
    R25 2
    Category
    Allround
    Starter
    Kick
    Power
    11.96 HP (8.7 kW)) @ 5600 RPM
    Clutch
    Single plate dry-cable operated
    Gearbox
    4-speed
    Ignition
    Battery
    Top Speed
    80.0 km/h (49.7 mph)
    Fuel System
    Carburettor. Bing
    Bore X Stroke
    68.0 x 68.0 mm (2.7 x 2.7 inches)
    Compression
    6.5:1
    Displacement
    247.00 ccm (15.07 cubic inches)
    Cooling System
    Air
    Engine Details
    Single cylinder, four-stroke
    Fuel Consumption
    2.90 litres/100 km (34.5 km/l or 81.11 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
    790 mm (31.1 inches)
    Overall Height
    730 mm (28.7 inches)
    Overall Length
    2,020 mm (79.5 inches)
    Ground Clearance
    108 mm (4.3 inches)
    Weight Incl Oil Gas Etc
    140.0 kg (308.6 pounds)
    Seat
    Solo seat with springs
    Rear Tyre
    2.99-19
    Frame Type
    Steel-single cradlel
    Front Tyre
    2.99-19
    Rear Brakes
    Expanding brake (drum brake)
    Front Brakes
    Expanding brake (drum brake)
    Rear Suspension
    Twin shock-Plunger
    Front Suspension
    Cartridge
    Rear Brakes Diameter
    160 mm (6.3 inches)
    Front Brakes Diameter
    160 mm (6.3 inches)