AI
Bmw
R 51/2
Classic · 494 cc
For sale now1 motorcycles
- Engine
- 494 cc
- Power
- 24 hp
- Weight
- 185 kg
- Price range
- €13,450 – €13,450
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Asking prices
€13,450typical asking price
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Model family
R 51/2 at a glance
Quick reference values. Model year, generation and trim can differ.
Displacement
494 cc
Power
24 hp · 18 kW
Category
Classic
Specifications
- Displacement
- 494 cc
- Power
- 24 hp · 18 kW
- Weight
- 185 kg
- Fuel capacity
- 14 l
- Top speed
- 135 km/h
- Production
- 1950 – 1951
- Category
- Classic
Search results
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Comparable models
Also worth considering
Models in the same category and price range to consider alongside the R 51/2.
Generations and editions
Features and handling differ by generation. Use this overview to find the right version.
1 variants
Years
1950 - 1951
R 51/2 (1950-1951)
GenerationThe 1950-1951 R 51/2 is the short-lived post-war 494 cc OHV boxer with 24 hp, a four-speed gearbox and shaft drive. It is based on the R 51, but identify it as its own transitional model before the R 51/3.
494 cc24 hp2 cyl.A2 suitable
About this model
About the Bmw R 51/2
The 1950-1951 BMW R 51/2 was BMW's first large post-war boxer. It developed the pre-war R 51 concept with a 494 cc OHV twin, but is a distinct, short-lived transitional model. Its 24 hp boxer, shaft drive, telescopic fork and rear suspension make it fundamentally different from the single-cylinder R 24/R 25 family. A recognisable R 51/2 feature is the split valve covers held by a clip.
Do not confuse it with the R 51/3 from 1951: always confirm type and frame number, engine configuration and correct details. When buying, pay attention to engine, clutch, four-speed gearbox, shaft, chassis, drum brakes and 6V electrics. On this early post-war boxer, matching numbers, period-correct parts and an evidenced restoration often matter more than cosmetics alone.
- Category
- Classic
- Production
- 1950 – 1951
- Power
- 24 hp
- Weight
- 185 kg
Before you buy
What to check before buying
- Confirm R 51/2, 1950-1951 years, frame number and split valve covers; do not confuse it with an R 51, R 51/3 or the single-cylinder R 24/R 25.
- From cold, check the 494 cc OHV boxer for compression, valve-train and timing noise, oil pressure and leaks around heads and crankcase.
- Test clutch, four-speed gearbox, shaft and final drive for shift quality, play, bearing noise and oil loss.
- Inspect telescopic fork, rear suspension, frame and mountings for wear, corrosion, distortion and non-original restoration work.
- Check drum brakes, spoked wheels, tyres and the 6V ignition/charging system for safe operation and correct materials.
Frequently asked questions
Frequently asked questions about the Bmw R 51/2
What does a used Bmw R 51/2 cost?
A used Bmw R 51/2 costs €13,450 on average. Most cost €13,450 to €13,450. This is based on 1 motorcycles for sale now.
How many used Bmw R 51/2 are for sale?
MotorMonitor now compares 1 used Bmw R 51/2 motorcycles from Dutch sales sites.