
BMW R12 Twin carb
Key specifications
Overview
Introduction to the 1942 BMW R12 Twin Carb: A Classic Sport Bike Step back into the golden age of motorcycling with the 1942 BMW R12 Twin Carb, a remarkable blend of engineering and style that captures the spirit of the era. Designed as a sport motorcycle, the R12 quickly established itself as a formidable contender in the post-war landscape, appealing to enthusiasts who valued both performance and the thrill of the open road. With its iconic boxer engine configuration and sleek lines, the R12 is not just a bike; it’s a piece of history that continues to inspire riders and collectors alike. Engine Performance and Riding Characteristics At the heart of the R12 lies a powerful 745cc two-cylinder boxer engine, producing an impressive 19.99 horsepower at 4,000 RPM. This classic four-stroke powerhouse delivers a top speed of 120 km/h (74.6 mph), embodying the spirit of performance that BMW is renowned for. The air-cooled design, complemented by a sophisticated Amal carburettor fuel system, ensures a responsive throttle and an exhilarating ride. Riders will appreciate the smoothness of the 4-speed gearbox, paired with a dry multiplate clutch that provides precise engagement and control. The balanced weight of 185 kg (407.9 pounds) allows for agile handling, making the R12 a joy to navigate through twisty roads or along open highways. Key Features and Technology The R12 is not just about raw power; it's a testament to innovative engineering of its time. The steel double cradle frame offers exceptional stability, while the cartridge front suspension and rigid rear suspension maintain a comfortable ride even on uneven surfaces. Stopping power is provided by single expanding drum brakes in the front and rear, ensuring reliable deceleration as you carve through corners. With a fuel capacity of 14 liters (3.70 gallons), the R12 allows for extended rides without frequent stops, making it a perfect companion for long-distance journeys. The classic kickstarter adds a charming touch, evoking nostalgia while providing the rider with a direct connection to the machine. **
Pros
Cons
- Timeless Design: The classic aesthetic and boxer engine are iconic, making it a highly collectible piece.
- Smooth Performance: The engine delivers a good balance of power and torque, ensuring a responsive ride.
- Stable Handling: The steel frame and suspension setup provide excellent stability, enhancing rider confidence.
- Limited Power Output: At just under 20 HP, the R12 may lack the modern performance expected by today’s riders.
- Manual Kickstart: The absence of an electric starter can be a drawback for those accustomed to modern conveniences.
- Weight Consideration: While stable, the R12's weight may hinder agility compared to lighter contemporary models.
Technical details
Source specification data
- Make
- BMW
- Model
- R12 Twin carb
- Category
- Sport
- Starter
- Kick
- Power
- 19.99 HP (14.6 kW)) @ 4000 RPM
- Clutch
- Dry multiplate-cable operated
- Gearbox
- 4-speed
- Top Speed
- 120.0 km/h (74.6 mph)
- Fuel System
- Carburettor. Amal
- Bore X Stroke
- 78.0 x 78.0 mm (3.1 x 3.1 inches)
- Compression
- 5.2:1
- Displacement
- 745.00 ccm (45.46 cubic inches)
- Cooling System
- Air
- Engine Details
- Two cylinder boxer, four-stroke
- Lubrication System
- Wet sump
- Dry Weight
- 185.0 kg (407.9 pounds)
- Fuel Capacity
- 14.00 litres (3.70 gallons)
- Overall Width
- 900 mm (35.4 inches)
- Overall Height
- 940 mm (37.0 inches)
- Overall Length
- 2,100 mm (82.7 inches)
- Power Weight Ratio
- 0.1081 HP/kg
- Rear Tyre
- 3.5-19
- Frame Type
- Steel-doble cradle
- Front Tyre
- 3.50-19
- Rear Brakes
- Expanding brake (drum brake)
- Front Brakes
- Expanding brake (drum brake). Single
- Rear Suspension
- Rigid-
- Front Suspension
- Cartrige
- Front Brakes Diameter
- 200 mm (7.9 inches)