Back to Bike FinderYears: 1956 · 1955 · 1954 · 1953
BMW R25 3
1953Allround

BMW R25 3

Key specifications

Engine
247 cc
Power
13 HP
Fuel type
petrol
Fuel capacity
3.2 L
Transmission
4-speed
Seat height
29 mm
Front brakes
Expanding brake (drum brake)
Rear brakes
Expanding brake (drum brake)

Overview

Introducing the 1953 BMW R25 3: A Timeless Classic The 1953 BMW R25 3 stands as a remarkable example of mid-20th century motorcycle engineering, perfectly embodying the ethos of the Allround category. This bike was designed for versatility, catering to both leisure riders and those seeking dependable daily transportation. With its elegant lines and robust construction, the R25 3 has earned a special place in the hearts of motorcycle enthusiasts and collectors alike. Its classic design is not just a nod to the past; it serves as a testament to BMW's commitment to quality and performance, making it a revered icon in the world of motorcycling. Engine Performance and Riding Characteristics At the heart of the R25 3 lies a spirited 247cc single-cylinder, four-stroke engine that produces a respectable 13.05 HP at 5800 RPM. While the power output may seem modest by today’s standards, the bike's lightweight construction—tipping the scales at just 150 kg—ensures that the R25 3 can achieve a top speed of 119 km/h (73.9 mph). The bike's smooth power delivery, coupled with a 4-speed gearbox, allows for an engaging riding experience that is both responsive and enjoyable. Whether navigating through city streets or embarking on weekend excursions, the R25 3 offers stability and a nimble feel, making each ride a delightful adventure. Key Features and Technology The R25 3 showcases several innovative features for its time, including a closed steel loop-welded frame that provides both strength and lightness, enhancing the bike's overall agility. The suspension system—featuring cartridge front forks and telescopic rear suspension—ensures a smooth ride over various terrains. With drum brakes front and rear, each measuring 160 mm in diameter, riders can count on reliable stopping power. Moreover, the bike's fuel efficiency is nothing short of impressive, with a consumption rate of just 2.90 litres per 100 km, allowing for extended journeys without frequent refueling stops. The classic kick starter adds an extra layer of nostalgia, inviting riders to connect with the mechanical aspect of motorcycling. **

Pros

    Cons

    • Timeless Design: The R25 3 boasts an iconic aesthetic that appeals to classic motorcycle enthusiasts, making it a standout at any gathering.
    • Fuel Efficiency: With an impressive fuel consumption rate, this bike is a cost-effective option for those looking to enjoy long rides without breaking the bank.
    • Lightweight and Agile: Weighing in at 150 kg, the R25 3 offers an engaging and responsive ride, perfect for both urban commuting and leisurely weekend trips.
    • Limited Power: The modest engine output may not satisfy those seeking high-performance thrills, especially when compared to modern motorcycles.
    • Drum Brakes: While adequate for its time, the drum brake system may feel less capable to contemporary riders accustomed to more advanced braking technologies.
    • Kick Start Only: The traditional kick starter may be a charming feature for some, but it could pose a challenge for those who prefer the convenience of electric starting.

    Technical details

    Source specification data

    Make
    BMW
    Model
    R25 3
    Category
    Allround
    Starter
    Kick
    Comments
    88Kph is the top speed with original sidecar.
    Carrying Capacity
    320kg
    Power
    13.05 HP (9.5 kW)) @ 5800 RPM
    Clutch
    Single plate dry-cable operated
    Gearbox
    4-speed
    Ignition
    Battery
    Top Speed
    119.0 km/h (73.9 mph)
    Fuel System
    Carburettor. Bing
    Bore X Stroke
    68.0 x 68.0 mm (2.7 x 2.7 inches)
    Compression
    7.1:1
    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)
    Seat Height
    730 mm (28.7 inches) If adjustable, lowest setting.
    Fuel Capacity
    12.00 litres (3.17 gallons)
    Overall Width
    760 mm (29.9 inches)
    Overall Height
    710 mm (28.0 inches)
    Overall Length
    2,065 mm (81.3 inches)
    Ground Clearance
    92 mm (3.6 inches)
    Weight Incl Oil Gas Etc
    150.0 kg (330.7 pounds)
    Seat
    Spring-mounted seat
    Rear Tyre
    3.27-18
    Frame Type
    Closed steel loop-welded
    Front Tyre
    3.27-18
    Rear Brakes
    Expanding brake (drum brake)
    Front Brakes
    Expanding brake (drum brake)
    Rear Suspension
    Telscopic
    Front Suspension
    Cartridge
    Rear Brakes Diameter
    160 mm (6.3 inches)
    Front Brakes Diameter
    160 mm (6.3 inches)