BMW R 100GS (1987) vs BMW R 100RT Mono (1987-89)
Comparison technical specifications
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| Make: | BMW | BMW |
| Model: | R 100GS | R 100RT Mono |
| Years: | 1987 | 1987-89 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder | Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder |
| Capacity: | 980 cc / 59.8 cu in. | 980 cc 59.8 cu in |
| Bore x Stroke: | 94 x 70.6 mm | 94 x 70.6 mm |
| Cooling System: | Air cooled | Air cooled |
| Compression Ratio: | 8.5:1 | 8.45:1 |
| Induction: | 2 x Bing carburetors | 2 x Constant depression carburettors, Bing 94/40/105 - 94/40/106 |
| Ignition: | Electronic ignition, Bosch | Battery ignition |
| Alternator: | Bosch 12V/280 W | Bosch 12V/240 W |
| Starting: | Electric | Electric |
| Max Power: | 44 kW / 60 hp @ 6500 rpm | 43.7 kW / 60 hp @ 7000 rpm |
| Max Torque: | 76 Nm / 7.75 kgf-m / 56 ft-lb @ 3750 rpm | 74 Nm / 7.5 kgf-m / 54.6 ft-lb @ 6000 rpm |
| Clutch: | Dry single plate, with diaphragm spring | Dry single plate, with diaphragm spring |
| Transmission: | 5 Speed | 5 Speed |
| Gear Ratio: | 1st 4.40 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50:1 | 1st 4.4 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50 : 1 |
| Rear Wheel Ratio: | 1:3.09 | 1:2.91 or 1:3.00 |
| Bevel / Crown wheel: | 11/34 teeth | 11 / 32 teeth or 10 / 32 teeth |
| Final Drive: | Shaft | Shaft |
| Frame: | Double loop tubular frame with bolt on rear section | Double sown tubs, dual cradle |
| Front Suspension: | Telescopic fork with hydraulic shock absorber. | Telescopic fork with hydraulic shock absorber. |
| Front Wheel Travel: | 225 mm / 8.8 in | 200 mm / 7.8 in |
| Rear Suspension: | Paralever adjustable preload, rebound damping compression | Monolever swinging arm |
| Rear Wheel Travel: | 180 mm / 7.0 in | 125 mm / 4.9 in |
| Front Brakes: | Single ∅285mm disc, 2 piston caliper | 2 x ∅260mm discs, 2 piston calipers |
| Rear Brakes: | ∅200 Drum | Simplex ∅200 mm drum |
| Front Wheel: | 1.85 - 21 MTH 2 | 1.85 B 19 |
| Rear Wheel: | 2.50 - 17 MTH 2 | 2.75 C 18 |
| Front Tyre: | 90/90-21 | 3.25 H-19 |
| Rear Tyre: | 130/80-17 | 4.00 H-18 |
| Dimensions: | Length 2290 mm / 90.1 in Width 1000 mm / 39.3 in Height 1165 mm / 45.8 in | Length 2110 mm / 87 in Width 746 mm / 29.37 in Height 1465 mm / 57.67 in |
| Wheelbase: | 1514 mm / 59.6 in | 1465 mm / 57.67 in |
| Seat Height: | 850 mm / 33.5 in | 820 mm / 32.3 in |
| Ground Clearance: | 200 mm / 7.9 in | 165 mm / 6.49 in |
| Wet Weight: | 210 kg / 462 lbs | 238 Kg / 525 lbs |
| Fuel Capacity: | 24 L / 6.3 US gal | 24 Litres / 6.3 US gal |
| Top Speed: | 181 km/h / 112 mph | 203 km/h / 126 mph |