BMW R 80 ST
Number sold 5.963
Price 9.490,- DM
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| Type | four-stroke, two-cylinder, horizontally-opposed "Boxer" engine, air-cooled |
| Bore/stroke | 84,8 x 70,6 mm |
| Cubic capacity | 797,5 cm3 |
| Max power | 50 PS (37kW) at 6500 rpm |
| Max torque | 56,7 Nm at 5000 rpm |
| Compression ratio | 8,2 : 1 |
| Valves per cylinder | 2 |
| Valve control | ohv, using push rod and rocker arm |
| Carburation system | 2 constant depression carburettors Bing V 64/32/305- 64/32/306 |
| Engine lubrication | wet sump |
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| Power transmission | |
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| Clutch | dry single plate, with lever-action diaphragm spring |
| Number of gears | 5 |
| Gear selection | dog-type gearbox (ratchet foot lever) |
| Gear ratios | 4,4 / 2,86 / 2,07 / 1,67 / 1,50 :1 |
| Rear wheel ratio | 1 : 3,36 |
| Bevel/crown wheel | 11/ 37 teeth |
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| Electrical system | |
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| Alternator | Bosch 280 W |
| Ignition | Contact-free electronic ignition (Bosch) |
| Starter | Bosch 0,7 kW |
| Spark plugs | W 7 D / Beru 14 - 7 D / Champion N 10 Y |
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| Suspension | |
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| Type of frame | double-loop tubular frame with bolt-on rear section |
| Front suspension | telescopic fork with hydraulic shock absorber |
| Rear suspension | BMW Monolever - swinging arm |
| Spring travel | 175 / 153 mm |
| Rims front | 1,85 B 19 |
| Rims rear | 2,50 B 18 |
| Tyres front | 100/90 H 19 |
| Tyres rear | 120/90 H 18 |
| Brakes front | single disc brake Ø 260 mm |
| Brakes rear | Simplex drum brake Ø 200 mm |
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| Dimensions and weights | |
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| Length x width x height | 2180 x 790 x 1150 mm |
| Wheel base | 1446 mm |
| Ground clearance | 170 mm |
| Tank capacity | 19 l |
| Unladen weight, full tank | 198 kg |
| Max permissible weight | 398 kg |
| Fuel consumption | 5,0 l / 100 km (at constant 90 km/h) |
| Acceleration | 0 - 100 km/h 5,6 s |
| Top speed | 174 km/h |
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