| TECHNICAL SPECIFICATION | |
|---|---|
| Model ID | |
| Manufacturer (Make) | BMW |
| Model Name | R 100 RS |
| Year | 1980 |
| Category(class) | Classic |
| Engine | |
| Engine Capacity (Displacement) | 979 ccm (59.74 cubic inches) |
| Engine Type | 2 cylinders |
| Bore x Stroke | Ø94.0 mm x 70.6 mm (Ø3.7 inches x 2.78 inches) |
| Bore/Stroke Ratio | 1.33 |
| Stroke | 4 |
| Valves per Cylinder | 2 |
| Timing System | OHV |
| Cooling System | Air |
| Powertrain | |
| Gearbox | 5 speed |
| Chassis/Suspension/Brakes | |
| Front Brakes | Dual disc |
| Rear Brakes | Single disc |
| Front Tire | 3.25-19 |
| Rear Tire | 4.00-18 |
| Dimensions | |
| Curb Weight | 247 kg (545 lb) |
| Fuel Capacity | 24 litres (6.34 gallons) |
| Performance | |
| Max Power | 70.00 HP (51.1 kW) at 7000 RPM |
| Power/Weight Ratio | 0.28 Hp/Kg |
| Top Speed | 193 km/h (120mph) |
| Acceleration (dart, speedup) time | |
| 0-100 km/h | 5.3 seconds |
| 0-60 mph | 5.1 seconds |
| - | |
| - | |
Engine |
| |
| Motor Type | Four-stroke two cylinder horizontally opposed "Boxer" engine, air cooled | |
| Bore x Stroke | 94 x 70.6 mm (3.70 x 2.78 in) | |
| Displacement | 980 cc | |
| Max Power | 70 hp (51 KW) at 7,250 rpm | |
| Max Torque | 76 Nm / 56 ft lb at 5,500 rpm | |
| Compression Ratio | 9.5 : 1 | |
| Valves Per Cylinder | 2 | |
| Valve Control | OHV, using push rod and rocker arm | |
| Carburation System | 2 constant depression carburettors, Bing 94/40/105 - 94/40/106 | |
| Engine Lubricating System | Wet sump | |
| | | |
| Power Transmission |
| |
| Clutch | Dry single plate, with diaphragm spring | |
| Number of Gears | 5 | |
| Gear Selection | Dog type gearbox (ratchet foot lever) | |
| Gearbox Ratios | 4.4 / 2.86 / 2.07 / 1.67 / 1.50 : 1 (Optional sport version: 3.38 / 2.43 / 1.93 / 1.67 / 1.50 | |
| Rear Wheel Ratio | 1 : 3.0 or 1 : 2.91 | |
| Bevel/Crownwheel | 11 / 33 teeth or 11 / 32 teeth | |
| | | |
| Electrical System |
| |
| Ignition System | Battery ignition. From Sept 1980: contact free electronic ignition (Bosch) | |
| Alternator | Bosch 12V/240 W | |
| Starter | Bosch 0.6 hp (from 1978: 0.7 Kw) | |
| Spark Plugs | Bosch W 225 T 30 / Beru 230/14/3 A / Champion N6Y | |
| | | |
| Chassis |
| |
| Type of Frame | Double loop tubular frame with bolt on rear section | |
| Front wheel suspension | Telescopic fork with hydraulic shock absorber | |
| Rear wheel suspension | Long swinging arm with adjustable strut | |
| Spring Travel Front/Rear | 200 / 125 mm (7.87 x 4.92 in) | |
| Wheel Rims, Front | 1.85 B 19 | |
| Wheel Rims, Rear | 2.50 B 18 | |
| Tyres, Front | 3.25 H 19 | |
| Tyres, Rear | 4.00 H 18 | |
| Brakes, Front | Dual disc brake 260 mm / 10.23 in diameter. ATE 1 piston caliper up to 1981. 1981 models Brembo 2 piston caliper | |
| Brakes, Rear | Simplex drum brake 200 mm / 7.87 in diameter (from 1978: single disc brake 260 mm / 10.23 in diameter) | |
| | | |
| Dimensions/Weights |
| |
| Length x Width x Height | 2130 (from 1978: 2210) x 746 x 1300 mm (83.85 (or 87) x 29.37 x 51.18 in) | |
| Wheel Base | 1465 mm / 57.67 in | |
| Fuel Tank Capacity | 24 litres / 5.27 gal / 6.34 gal US | |
| Unladen Weight with Full Tank | 230 Kg / 506 lb | |
| Max. Permissible Weight | 398 Kg / 876 lb | |
| Ground Clearance | 165 mm / 6.49 in | |
| Seat Height (Unladen) | 820 mm (32.3 inches) | |
| Fuel Consumption (at constant 90 Kph) | 5.75 litres 100 Km / / 49 mpg / 40 mpg US | |
| Top Speed | 200 Kph / 124 mph | |
| Acceleration 0 - 100 Kph / 62 mph | 4.6 seconds | |
| | ||
