1950 BMW R51 2

Specifications
- Category
- Allround
- Displacement
- 494.0 ccm (30.14 cubic inches)
- Displacement (cc)
- 494.00
- Engine details
- Two cylinder boxer, four-stroke
- Power
- 24.1 HP (17.6 kW) @ 5600 RPM
- Top speed
- 135.0 km/h (83.9 mph)
- Compression
- 6.4:1
- Bore × stroke
- 68.0 x 68.0 mm (2.7 x 2.7 inches)
- Fuel system
- Carburettor. Bing 22mm
- Fuel control
- Overhead Valves (OHV)
- Ignition
- Battery
- Lubrication
- Wet sump
- Cooling
- Air
- Gearbox
- 4-speed
- Transmission
- Shaft drive (cardan) (final drive)
- Clutch
- Dry-single plate-cable operated
- Frame
- Steel single cradle
- Front suspension
- Cartridge
- Rear suspension
- Twin shock-Swingarm
- Front tyre
- 3.50-19.00
- Rear tyre
- 3.50-19.00
- Front brakes
- Expanding brake (drum brake). Half hub
- Front brake Ø
- 200 mm (7.9 inches)
- Rear brakes
- Expanding brake (drum brake). Half hub
- Rear brake Ø
- 200 mm (7.9 inches)
- Wet weight
- 185.0 kg (407.9 pounds)
- Height
- 720 mm (28.3 inches)
- Length
- 2130 mm (83.9 inches)
- Width
- 815 mm (32.1 inches)
- Wheelbase
- 1400 mm (55.1 inches)
- Fuel capacity
- 14.00 litres (3.70 US gallons)
- Starter
- Kick
The 1950 BMW R51 2
1950 BMW R51 2 sits in the postwar sweet spot of BMW's revived twin-cylinder lineup, a boxer built to prove the factory was back in business after years of disruption. This is a machine meant for steady, unhurried touring rather than sport riding: the shaft drive keeps maintenance simple and clean, the boxer twin runs smooth at cruising speeds, and the whole package feels solid rather than sporty under you. Riders who've spent time on it describe a bike that rewards patience and mechanical sympathy over aggressive throttle work, with the kind of low-slung stability that makes long days on the road manageable rather than tiring. 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 collector or vintage BMW devotee rather than a daily rider, often someone stepping up from smaller prewar singles into serious postwar boxer ownership. Given moderate to high collector interest, well-documented examples of the 1950 BMW R51 2 with intact mechanicals and original finishes command real attention at auction.
Auction history
| Date | Listing | Price | Mileage | Source |
|---|---|---|---|---|
| Oct 9, 2022 | 1950 BMW BMW R51/2 | $45,000 | — | Bring a Trailer |
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