BMW R 80G/S (1980) vs BMW R 80GS (1988)
Comparison technical specifications
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| Make: | BMW | BMW |
| Model: | R 80G/S | R 80GS |
| Years: | 1980 | 1988 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder |
| Capacity: | 797.5 cc / 48.7 cu in. | 797.5 cc / 48.7 cu in. |
| Bore x Stroke: | 84.8 x 70.6 mm | 84.8 x 70.6 mm |
| Cooling System: | Air cooled | Air cooled |
| Compression Ratio: | 9.2:1 | 8.2:1 |
| Induction: | 2 x Bing constant depression carburetorss | 2 x Bing constant depression carburetors |
| Ignition: | Battery ignition | Battery ignition |
| Alternator: | Bosch 12 V/280 W | Bosch 12 V/280 W |
| Spark Plug: | Bosch W 7 D / Beru14-7DU / Champion N9YC | Bosch W 7 D / Beru14-7DU / Champion N9YC |
| Starting: | Electric & Kick | Electric |
| Max Power: | 37 kW / 50 hp @ 6500 rpm | 37 kW / 50 hp @ 6500 rpm |
| Max Torque: | 56.7 Nm / 5.8 kgf-m / 41 ft lb @ 5000 rpm | 61 Nm / 6.2 kgf-m / 44 ft lb @ 5000 rpm |
| Clutch: | Dry single plate, with diaphragm spring | Dry single plate, with diaphragm spring |
| Transmission: | 5 Speed | 5 Speed |
| Final Drive: | Shaft | Shaft |
| Gear Ratio: | 1st 4.40 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50:1 | 1st 4.40 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50:1 |
| Rear Wheel Ratio: | 1:3.20 | 1:3.20 |
| Frame: | Double loop tubular frame with bolt on rear section | Double loop tubular frame with bolt on rear section |
| Front Suspension: | Telescopic hydraulic forks | ∅40mm Marzocchi telescopic hydraulic forks. |
| Front Wheel Travel: | 200 mm / 7.8 in | 225 mm / 8.8 in |
| Rear Suspension: | Monolever swinging arm | BMW Paralever swinging arm |
| Rear Wheel Travel: | 170 mm / 6.6 in | 180 mm / 7.0 in |
| Front Brakes: | Single ∅260mm disc | Single ∅285mm disc |
| Rear Brakes: | ∅200mm Drum | ∅200mm Drum |
| Front Tyre: | 3.00 - 21 | 90/90 x 21S |
| Rear Tyre: | 4.00 - 18 | 13/80 x 17S |
| Dimensions: | Length 2230 mm / 87.7 in Width 820 mm / 32.3 in Height 1150 mm / 45.2 in | Length 2290 mm / 90.1 in Width 1000 mm / 39.3 in Height 1165 mm / 45.8 in |
| Wheelbase: | 1465 mm / 67.6 in | 1514 mm / 59.6 in |
| Ground Clearance: | 175 mm / 6.88 in | 200 mm / 7.87 in |
| Seat Height: | 860 mm / 33.9 in | 850 mm / 33.5 in |
| Wet Weight: | 186 kg / 409 lbs | 210 kg / 462 lbs |
| Fuel Capacity: | 19.5 L / 5.1 US gal | 24 L / 6.3 US gal |
| Standing ¼ Mile: | 13.8 sec | 13.7 sec / 149.6 km/h / 93 mph |
| Top Speed: | 167 km/h / 104 mph | 170.4 km/h / 106 mph |