The BMW R90S motorcycle specifications include a 898 cc (54.80 cu in) engine, power of 67.1 hp (48.9 kW) @ 7,000 rpm, and a listed weight of 215 kg (474 lb).
Key specifications
How the BMW R90S compares
This compares the motorcycle with all BMW models in this specifications database. The blue marker is this model and the grey line is the BMW database average.
About 18% lower than the BMW database average. Around the 44th percentile across BMW models.
Very close to the BMW database average. Around the 51st percentile across BMW models.
About 5% lighter than the BMW database average. Around the 42nd percentile across BMW models.
Very close to the BMW database average. Around the 72nd percentile across BMW models.
About 25% larger than the BMW database average. Around the 88th percentile across BMW models.
BMW database percentile rankings
Percentiles show where this motorcycle sits across the BMW specifications database. They are descriptive database rankings, not performance ratings.
67.1 hp — more powerful than about 44% of BMW models with power data.
898 cc — larger displacement than about 51% of BMW models.
215 kg — heavier than about 42% of BMW models, or lighter than about 58%.
820 mm — taller than about 72% of BMW models.
24 L — larger than about 88% of BMW fuel tanks in this database.
Dimensions compared with BMW average
Each measurement is compared with the average value across BMW models where that dimension is available.
2,180
2,193
Close to average.
740
877
16% below average.
1,210
1,199
Close to average.
1,465
1,497
Close to average.
820
809
Close to average.
Mechanical overview
Additional useful specifications
| Power-to-weight ratio | 0.312 hp/kg |
|---|---|
| Power-to-weight | 312.1 hp/tonne |
| Specific power | 74.7 hp/L |
| Bore/stroke ratio | 1.27:1 (Oversquare) |
Model information
| Year released | 1973 |
|---|
Engine specifications
| Engine type | Two cylinder boxer, four-stroke |
|---|---|
| Displacement | 898 cc (54.80 cu in) |
| Power | 67.1 hp (48.9 kW) @ 7,000 rpm |
| Torque | 76.0 Nm (7.7 kgf-m or 56.1 ft.lbs) @ 5,500 rpm |
| Bore × stroke | 90.0 x 70.6 mm (3.5 x 2.8 inches) |
| Compression ratio | 9.5:1 |
| Cooling system | Air |
| Fuel system | Carburettor. Dell´Orto |
| Ignition | Kettering |
Transmission and drivetrain
| Final drive | Shaft drive (cardan) (final drive) |
|---|---|
| Clutch | Dry Single Plate |
Chassis and suspension
| Frame | Double Loop Tubular |
|---|---|
| Front suspension | Telescopic fork, hydraulic |
| Rear suspension | Swingarm |
Brakes, wheels and tires
| Front brakes | Double disc |
|---|---|
| Rear brakes | Expanding brake (drum brake) |
Dimensions and weight
| Wet weight | 215 kg (474 lb) |
|---|---|
| Seat height | 820 mm (32.3 inches) |
| Overall length | 2,180 mm (85.8 inches) |
| Overall width | 740 mm (29.1 inches) |
| Overall height | 1,210 mm (47.6 inches) |
| Wheelbase | 1,465 mm (57.7 inches) |
Fuel and emissions
| Fuel capacity | 24.00 L (6.34 US gal) |
|---|
Performance
| Top speed | 200.0 km/h (124.3 mph) |
|---|
Other specifications
| Color options | Yellow |
|---|
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from BMW models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official BMW information before relying on them. Visit the official BMW website.