BMW R25 2 1951 - Specifications & Review
Article Complete Info
| Articleid | 960707 |
|---|---|
| Category | Allround |
| Make | BMW |
| Model | R25 2 |
| Year | 1951 |
Chassis, Suspension, Brakes & Wheels
| Frametype | Steel-single cradlel |
|---|---|
| Frontbrakes | Expanding brake (drum brake) |
| Frontbrakesdiameter | 160 mm (6.3 inches) |
| Frontsuspension | Cartridge |
| Fronttyre | 2.99-19 |
| Rearbrakes | Expanding brake (drum brake) |
| Rearbrakesdiameter | 160 mm (6.3 inches) |
| Rearsuspension | Twin shock-Plunger |
| Reartyre | 2.99-19 |
| Seat | Solo seat with springs |
Engine & Transmission
| Borexstroke | 68.0 x 68.0 mm (2.7 x 2.7 inches) |
|---|---|
| Clutch | Single plate dry-cable operated |
| Compression | 6.5:1 |
| Coolingsystem | Air |
| Displacement | 247.00 ccm (15.07 cubic inches) |
| Enginedetails | Single cylinder, four-stroke |
| Fuelconsumption | 2.90 litres/100 km (34.5 km/l or 81.11 mpg) |
| Fuelsystem | Carburettor. Bing |
| Gearbox | 4-speed |
| Greenhousegases | 67.3 CO2 g/km. (CO2 - Carbon dioxide emission) |
| Ignition | Battery |
| Lubricationsystem | Wet sump |
| Power | 11.96 HP (8.7 kW)) @ 5600 RPM |
| Topspeed | 80.0 km/h (49.7 mph) |
| Transmissiontypefinaldrive | Shaft drive (cardan) |
Other Specifications
| Starter | Kick |
|---|
Physical Measures & Capacities
| Fuelcapacity | 12.00 litres (3.17 gallons) |
|---|---|
| Groundclearance | 108 mm (4.3 inches) |
| Overallheight | 730 mm (28.7 inches) |
| Overalllength | 2,020 mm (79.5 inches) |
| Overallwidth | 790 mm (31.1 inches) |
| Seatheight | 730 mm (28.7 inches) If adjustable, lowest setting. |
| Weightincloilgasetc | 140.0 kg (308.6 pounds) |
About BMW R25 2 1951
The 1951 BMW R25/2 is a classic motorcycle that embodies the essence of post-war German engineering, carving a niche for itself in the allround category. Launched in a time when motorcycles were gaining momentum as a means of affordable transportation, the R25/2 quickly became a favorite among riders who appreciated its blend of reliability, style, and practicality. Sporting the iconic BMW badge, this model not only stands as a testament to the brand's commitment to quality but also as a beloved piece of motorcycle history that continues to attract enthusiasts and collectors alike.
At the heart of the R25/2 lies a robust 247 cc single-cylinder, four-stroke engine that produces a respectable 11.96 horsepower at 5600 RPM. This power allows it to reach a top speed of 80 km/h (49.7 mph), making it a competent performer for both city commuting and leisurely country rides. The 6.5:1 compression ratio and Bing carburettor fuel system ensure smooth operation and efficient fuel consumption, with an impressive rating of 2.90 liters per 100 km (approximately 81.11 mpg). Riders will appreciate the simplicity of the 4-speed gearbox, complemented by a reliable shaft drive that minimizes maintenance while providing smooth and confident power delivery.
The R25/2’s design is equally notable, featuring a steel single cradle frame that provides a solid foundation for its suspension system. The front and rear drum brakes, both measuring 160 mm, offer reliable stopping power, while the cartridge front suspension and twin shock-plunger rear suspension ensure a comfortable ride over varying terrains. With a seat height of 730 mm, it offers a low center of gravity, making it accessible for riders of different statures. Additionally, the classic kickstarter adds a nostalgic touch, appealing to those who appreciate the raw, mechanical feel of vintage motorcycles.
Pros:
- Fuel Efficiency: With a fuel consumption of just 2.90 liters per 100 km, the R25/2 is a cost-effective option for daily rides.
- Simplicity and Reliability: The straightforward design and shaft drive system contribute to low maintenance and high reliability, ideal for both seasoned and novice riders.
- Classic Appeal: Its timeless design and iconic BMW styling make it a standout choice for classic motorcycle collectors and enthusiasts.
Cons:
- Limited Power: The relatively low horsepower may not satisfy riders seeking high-performance thrills or faster speeds.
- Drum Brakes: While effective, drum brakes may not offer the same stopping power and feel as modern disc brakes, potentially limiting performance in more demanding riding conditions.
- Kickstarter Only: The absence of an electric start can be a drawback for those who prefer the convenience of modern starting systems, especially in cold weather.
In sum, the 1951 BMW R25/2 is not just a motorcycle; it's a piece of history that delivers a unique riding experience. With its combination of classic design, efficient performance, and the charm of vintage engineering, it remains a cherished choice among motorcycle aficionados today.