1950 BMW R25

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Specifications
- Category
- Allround
- Displacement
- 247.0 ccm (15.07 cubic inches)
- Displacement (cc)
- 247.00
- Engine details
- Single cylinder, four-stroke
- Power
- 12.0 HP (8.8 kW) @ 5600 RPM
- Top speed
- 80.0 km/h (49.7 mph)
- Compression
- 6.5:1
- Bore × stroke
- 68.0 x 68.0 mm (2.7 x 2.7 inches)
- Fuel system
- Carburettor. Bing
- Fuel control
- Overhead Valves (OHV)
- Ignition
- Battery
- Lubrication
- Wet sump
- Cooling
- Air
- Gearbox
- 4-speed
- Transmission
- Shaft drive (cardan) (final drive)
- Clutch
- Single plate dry-cable operated
- Frame
- Steel-single cradlel
- Front suspension
- Cartridge
- Rear suspension
- Pushrod
- Front tyre
- 3.25-19
- Rear tyre
- 3.25-19
- Front brakes
- Expanding brake (drum brake)
- Front brake Ø
- 160 mm (6.3 inches)
- Rear brakes
- Expanding brake (drum brake)
- Rear brake Ø
- 160 mm (6.3 inches)
- Wet weight
- 140.0 kg (308.6 pounds)
- Height
- 710 mm (28.0 inches)
- Length
- 2073 mm (81.6 inches)
- Width
- 750 mm (29.5 inches)
- Fuel capacity
- 12.00 litres (3.17 US gallons)
- Starter
- Kick
The 1950 BMW R25
1950 BMW R25 sits at the entry point of BMW's postwar lineup, the small single that got the company back into full motorcycle production after the war. This is a simple, low-strung 250cc single built for getting around rather than showing off — modest power delivered smoothly, a shaft final drive that means no chain to clean or adjust, and a chassis tuned for steady, unhurried riding rather than back-road thrills. Owners describe it less as exciting and more as dependable, the kind of bike you rode to work or into the next town without drama. It rewards patient riders who value mechanical simplicity over outright speed.
The 1950 model carried over without significant mechanical changes from the prior year — buyers comparing it to a 1949 example should focus on mileage, service history, and condition rather than spec differences.
Today's buyer tends to be a postwar BMW collector or a rider drawn to early shaft-drive singles rather than someone seeking a daily rider. Interest sits at a moderate level, appealing to those restoring a piece of BMW's rebuilding era more than investors chasing rapid appreciation.
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