| MODEL | BMW R 80ST 1983 - 1984 |
| Year | 1983 - 1984 |
| Engine Type | Four-stroke, two-cylinder horizontally opposed boxer, pushrod operated, 2 valves per cylinder |
| Displacement / Capacity | 797.5 cc / 48.7 cu in |
| Bore X Stroke | 84.8 x 70.6 mm |
| Compression Ratio | 8.2:1 |
| Cooling System | Air cooled |
| Max Power | 37 kW / 50 hp @ 6500 rpm |
| Max Torque | 58 Nm / 5.9 kgf-m / 42 ft-lb @ 4000 rpm |
| Ignition | Battery ignition, Bosch 12 V / 280 W alternator |
| Induction | 2 x Bing constant-depression 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 hydraulic fork, 175 mm / 6.9 in travel |
| Rear Suspension | BMW Monolever single-sided swingarm, 153 mm / 6.0 in travel |
| Front Brakes | Single 285 mm disc, single-piston caliper |
| Rear Brakes | 200 mm drum |
| DIMENSION SPECS | |
| Overall Length | 2180 mm / 85.8 in |
| Overall Width | 790 mm / 31.1 in |
| Overall Height | 1150 mm / 45.3 in |
| Seat Height | 845 mm / 33.3 in |
| Wheelbase | 1447 mm / 57.0 in |
| Ground Clearance | 170 mm / 6.7 in |
| Dry Weight | — |
| Wet Weight | 198 kg / 436 lbs |
| WHEEL SPECS | |
| Front Tyre | 100/90-H19 |
| Rear Tyre | 120/90-H18 |
| FUEL SYSTEM | |
| Fuel Capacity | 19 Litres / 5.0 US gal |
| Fuel Consumption | 4.9 L/100 km / 20.4 km/l / 48 mpg |
| Top Speed | 174 km/h / 108 mph |
Photo: Jesús Gorriti, CC BY-SA 2.0, via Wikimedia Commons
Photo: Gastair, CC BY-SA 4.0, via Wikimedia Commons
The R 80 ST ran unchanged into 1983 and 1984 as BMW's light, G/S-derived roadster. Its upright bars, supple Monolever ride and nimble handling suited bumpy back roads, but limited wind protection, modest performance and a small tank kept it a niche choice, and it was replaced by the new Monolever R 80 in 1984.
