
BMW R12 Single Carb
Key specifications
Overview
### Discovering the 1935 BMW R12 Single Carb: A Classic Allrounder In the world of classic motorcycles, few models can claim the iconic status of the 1935 BMW R12 Single Carb. With its elegant design and robust engineering, the R12 was positioned as an allround motorcycle, appealing to both adventurous riders and those seeking reliable everyday transportation. As BMW's first series-produced motorcycle featuring a shaft drive, it represents a significant leap in motorcycle technology for its time, combining performance with practicality. The R12 not only captured the spirit of the era but also paved the way for future innovations within the BMW lineage. At the heart of the R12 is its powerful 745cc two-cylinder boxer engine, delivering a respectable 18 horsepower at 3,400 RPM. This four-stroke powerhouse produces a top speed of 110 km/h (68.4 mph), which was impressive for its day, allowing riders to confidently tackle both urban roads and country lanes. The bike’s 5.2:1 compression ratio and 25mm CK carburettor ensure smooth power delivery and efficient fuel consumption, boasting an economical 3.4 litres per 100 km (69.18 mpg). Riders will appreciate the R12's distinctive handling, thanks to its steel-pressed-loop frame, telescopic front fork, and rigid rear suspension, allowing for a balanced ride that gracefully absorbs the bumps of the road. What truly sets the R12 apart are its thoughtful features and the technology of its time. The expanding drum brakes, both front and rear, provide dependable stopping power, while the kick starter adds to its classic charm. The bike's design elements, such as its elegant lines and chrome accents, reflect the Art Deco influence of the 1930s, making the R12 a visual masterpiece as well as a mechanical one. With a fuel capacity of 14 litres (3.70 gallons), riders can enjoy longer journeys with fewer stops, enhancing the motorcycle's appeal as a true allrounder. ###
Pros
Cons
- Iconic Design: The R12's blend of vintage aesthetics with practical functionality makes it a sought-after classic among collectors and enthusiasts.
- Reliable Performance: The boxer engine is known for its durability and smoothness, providing a dependable ride for various conditions.
- Economical Fuel Consumption: With impressive fuel efficiency, the R12 allows for longer rides without frequent refueling, perfect for long-distance enthusiasts.
- Limited Power Output: While adequate for its time, modern riders may find the power output on the lower side compared to contemporary motorcycles.
- Rigid Rear Suspension: The lack of rear suspension may lead to a less comfortable ride on rough roads, which could deter some potential buyers.
- Kick Start Only: The absence of an electric start means that riders need to be physically capable of kick-starting the engine, which can be a challenge for some.
Technical details
Source specification data
- Make
- BMW
- Model
- R12 Single Carb
- Category
- Allround
- Starter
- Kick
- Carrying Capacity
- 300
- Power
- 18.00 HP (13.1 kW)) @ 3400 RPM
- Ignition
- Magneto
- Top Speed
- 110.0 km/h (68.4 mph)
- Fuel System
- Carburettor. CK 25mm
- 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)
- Engine Details
- Two cylinder boxer, four-stroke
- Fuel Consumption
- 3.40 litres/100 km (29.4 km/l or 69.18 mpg)
- Greenhouse Gases
- O2
- g/km. (
- O2
- -
- Carbon
- dioxide emission)
- Lubrication System
- Forced feed
- 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)
- Seat
- Single seat
- Wheels
- Spoked
- Rear Tyre
- 3.5-19
- Frame Type
- Steel-pressed-loop
- Front Tyre
- 3.5-19
- Rear Brakes
- Expanding brake (drum brake)
- Front Brakes
- Expanding brake (drum brake)
- Rear Suspension
- Rigid-
- Front Suspension
- Telescopic fork
- Rear Brakes Diameter
- 200 mm (7.9 inches)
- Front Brakes Diameter
- 200 mm (7.9 inches)