| MODEL | BMW R 100GS 1989 - 1990 |
| Year | 1989 - 1990 |
| Engine Type | Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder |
| Displacement / Capacity | 980 cc / 59.8 cu in |
| Bore X Stroke | 94 x 70.6 mm |
| Compression Ratio | 8.5:1 |
| Cooling System | Air cooled |
| Max Power | 44 kW / 60 hp @ 6500 rpm |
| Max Torque | 76 Nm / 7.75 kgf-m / 56 lb-ft @ 3750 rpm |
| Ignition | Bosch electronic ignition |
| Induction | 2 x Bing carburettors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 Speed |
| Clutch | Dry single plate, diaphragm spring |
| Final Drive | Shaft |
| CHASSIS SPECS | |
| Frame | Double loop tubular steel frame with bolt-on rear section |
| Front Suspension | Telescopic fork with hydraulic damping, 225 mm / 8.8 in travel |
| Rear Suspension | Paralever swingarm, single shock adjustable for preload and damping, 180 mm / 7.0 in travel |
| Front Brakes | Single 285 mm disc, 2-piston caliper |
| Rear Brakes | 200 mm drum |
| DIMENSION SPECS | |
| Overall Length | 2290 mm / 90.1 in |
| Overall Width | 1000 mm / 39.3 in |
| Overall Height | 1165 mm / 45.8 in |
| Seat Height | 850 mm / 33.5 in |
| Wheelbase | 1514 mm / 59.6 in |
| Ground Clearance | 200 mm / 7.9 in |
| Dry Weight | 199 kg / 439 lbs |
| Wet Weight | 210 kg / 462 lbs |
| WHEEL SPECS | |
| Front Tyre | 90/90-21 |
| Rear Tyre | 130/80-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 26 Litres / 6.9 US gal |
| Fuel Consumption | — |
| Top Speed | 181 km/h / 112 mph |
The R 100 GS of 1989-90 is the first-series big-bore GS, presented in late 1987 with the 980 cc boxer and BMW's Paralever rear end, which tamed the shaft-drive jacking of the earlier R 80 G/S. It paired a 21-inch front wheel and long-travel suspension with relaxed low-down torque, making it an approachable all-rounder that set the template for large adventure bikes.
