BMW R 80 G/S

Visual Date 1980 - 1987

Number sold 21.864

Price 8.920,- DM

Engine

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

 
Power transmission

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

 
Electrical system

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

 
Suspension

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 200 / 170 mm
Rims front 1,85 B 21
Rims rear 2,15 B 18
Tyres front 3,00 - 21 48 R
Tyres rear 4,00 - 18 64 R
Brakes front single disc brake 260 mm
Brakes rear Simplex drum brake 200 mm

 
Dimensions and weights

Length x width x height 2230 x 820 x 1150 mm
Wheel base 1465 mm
Ground clearance 175 mm
Tank capacity 19,5 l [Paris-Dakar: 32 l]l
Unladen weight, full tank 186 kg [Paris-Dakar: 205 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 168 km/h