BMW R 80

BMW R 80 Date 1984 - 1995

Number sold 13.815

Price 10.440,- 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 58,0 Nm at 4000 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 64/32/353 - 64/32/354
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 : 3,20
Bevel/crown wheel 10 / 32 teeth

 
Electrical system

Alternator Bosch 280 W
Ignition Contact-free electronic ignition (Bosch)
Starter Bosch 0,7 kW
Spark plugs W 7 DC / Beru 14 - 7 DU / Champion N 9 YC

 
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 175 / 121 mm
Rims front TH 2,50 x 18 E
Rims rear MTH 2,50 x 18 E
Tyres front 90/90 18 51 H
Tyres rear 120/90 18 65 H
Brakes front single disc brake 285 mm
Brakes rear Simplex drum brake 200 mm

 
Dimensions and weights

Length x width x height 2175 x 800 x 1106 mm
Wheel base 1447 mm
Ground clearance 140 mm
Tank capacity 22 l
Unladen weight, full tank 210 kg
Max permissible weight 440 kg
Fuel consumption 4,6 l / 100 km (at constant 90 km/h)
Acceleration 0 - 100 km/h 6,0 s
Top speed 178 km/h