Naked Motorcycles
1981BMW R 100 CS
19 fields on record
The 1981 BMW R 100 CS is a classic sport-tourer built for riders seeking reliable long-distance capability with genuine performance. Its air-cooled 979cc boxer engine delivers smooth power through shaft drive, while the nimble handling and comfortable ergonomics make it ideal for both spirited riding and extended touring adventures.
- Capacity
- 979.0 ccm
- Engine
- Boxer
- Gearbox
- 5-speed
- Wet weight
- 232.0 kg
- Seat height
- Not on record
Know it? Add it → - Power
- 70.0 HP (51.5 kW) @ 7000 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- A sporty-touring classic built for long, relaxed high-speed cruising on open roads rather than aggressive track riding.
- Built for
- A refined, gentleman's sport-tourer with shaft-drive smoothness, boxer torque, and timeless BMW styling.
- Not ideal for
- Not for riders seeking modern sportbike acceleration, aggressive cornering agility, or any off-road capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 979.0 ccm
- Power
- 70.0 HP (51.5 kW) @ 7000 RPM
- Engine type
- Boxer
- Power/weight ratio
- 0.3017 HP/kg (wet)
- Bore x stroke
- 94.0 x 70.6 mm
- Compression
- 9.5:1
- Cooling system
- Air
- Valves per cylinder
- 2
- Torque
- Not on record - add it
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Shaft
Performance
- Top speed
- 194.0 km/h (120.5 mph)
Dimensions & weight
Brakes & wheels
- Front brakes
- Dual disc
- Rear brakes
- Expanding brake
- Front tyre
- 3.25-19
- Rear tyre
- 4.00-18
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 1980 | 1981 | 1982 | 1983 |
|---|---|---|---|---|
| Capacity | 979 cc | 979 cc | 979 cc | 979 cc |
| Fuel capacity | 24 L | 24 L | 24 L | 24 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the BMW R 100 CS?
The 1981 BMW R 100 CS has a Capacity of 979.0 ccm (59.74 cubic inches).
What engine power does the BMW R 100 CS have?
The 1981 BMW R 100 CS has a Power of 70.0 HP (51.5 kW) @ 7000 RPM.
How many gears does the BMW R 100 CS have?
The 1981 BMW R 100 CS has a Gearbox of 5-speed.
How much does the BMW R 100 CS weigh?
The 1981 BMW R 100 CS has a Wet weight of 232.0 kg (511.5 pounds).
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