Model: R 80 G/S
Production  
Engine  
Power transmission  
Electrical System  
Chassis  
Dimensions/Weights  
     
Back to Index  Print
Production
Begin of Production   1980
End of Production   1987
Number Sold   21.864
Price   8.920,- DM
Engine
Motor Type   four-stroke, two-cylinder, horizontally-opposed "Boxer" engine, air-cooled
Bore x Stroke   84,8 x 70,6 mm
Cubic Capacity   797,5 ccm
Max Power   50 hp (37 KW) 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 / Crownwheel   11 / 37 teeth
Electrical System
Ignition   Contact-free electronic ignition (Bosch)
Alternator   Bosch 280 W
Starter   Bosch 0.7 kW
Spark Plugs   Bosch W 7 D/Beru 14-7D/Champion N 10 Y
Chassis
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 front/rear   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 dia
Brakes rear   simplex drum brake 200 mm dia
Dimensions/Weights
Length x Width x Height   2230 x 820 x 1150 mm
Wheel Base   1465 mm
Tank Capacity   19,5 l [Paris-Dakar: 32 l]
Unladen Weight, full Tank   186 kg [Paris-Dakar: 205 kg]
Max permissible Weight   398 kg
Ground Clearance   175 mm
Fuel Consumption   5,0 l/100 km (at constant 90 kph)
Top Speed   168 kph
Acceleration 0-100 kph   5,6 sec