BMW R 90 S
Number sold 17.465
Price 8.510,- DM
| Engine | |
|
| |
| Type | four-stroke, two-cylinder, horizontally-opposed "Boxer" engine, air-cooled |
| Bore/stroke | 90 x 70,6 mm |
| Cubic capacity | 898 cm3 |
| Max power | 67 PS (49,3 kW) at 7000 rpm |
| Max torque | 76 Nm at 5500 rpm |
| Compression ratio | 9,5 : 1 |
| Valves per cylinder | 2 |
| Valve control | ohv, using push rod and rocker arm |
| Carburation system | 2 slide carburettors, Dellorto PHM 38 AS-AD or 38 BS-BD |
| Engine lubrication | wet sump |
|
| |
| Power transmission | |
|
| |
| Clutch | dry single plate, with diaphragm spring |
| Number of gears | 5 |
| Gear ratios | 4,4 / 2,86 / 2,07 / 1,67 / 1,50 :1 |
| Rear wheel ratio | 1: 3,00 or 1 : 2,91 |
| Bevel/crown wheel | 11 / 33 teeth or 11 / 32 teeth |
|
| |
| Electrical system | |
|
| |
| Alternator | Bosch 12 V / 280 W |
| Ignition | battery ignition |
| Starter | Bosch 0,5 PS |
| Spark plugs | Bosch W 200 T 30 / Beru 200/14/3 A / Champion N 7 Y |
|
| |
| Suspension | |
|
| |
| Type of frame | double-loop tubular frame with bolt-on rear section |
| Front suspension | telescopic fork with hydraulic shock absorber |
| Rear suspension | long swinging arm with adjustable strut |
| Spring travel | 208 / 125 mm |
| Rims front | 1,85 B 19 |
| Rims rear | 2,15 B 18 |
| Tyres front | 3,25 H 19 |
| Tyres rear | 4,00 H 18 |
| Brakes front | dual-disc brake Ø 260 mm |
| Brakes rear | Simplex drum brake Ø 200 mm |
|
| |
| Dimensions and weights | |
|
| |
| Length x width x height | 2180 x 740 x 1210 mm |
| Wheel base | 1465 mm |
| Ground clearance | 165 mm |
| Tank capacity | 24 l |
| Unladen weight, full tank | 215 kg |
| Max permissible weight | 398 kg |
| Fuel consumption | 5,0 l / 100 km (at constant 90 km/h) |
| Acceleration | 0 - 100 km/h 4,8 s |
| Top speed | 200 km/h |
|
| |
