Model: R 80
Production  
Engine  
Power transmission  
Electrical System  
Chassis  
Dimensions/Weights  
     
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Production
Begin of Production   1981
End of Production   1995
Number Sold   13.815
Price   10.440,- 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   58 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 / Crownwheel   10 / 32 teeth
Electrical System
Ignition   Contact-free electronic ignition (Bosch)
Alternator   Bosch 280 W
Starter   Bosch 0.7 kW
Spark Plugs   Bosch W 7 DC/Beru 14-7 DU/Champion N 9 YC
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   175 / 121 mm
Rims front   MTH 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 dia
Brakes rear   simplex drum brake 200 mm dia
Dimensions/Weights
Length x Width x Height   2175 x 800 x 1106 mm
Wheel Base   1447 mm
Tank Capacity   22 l
Unladen Weight, full Tank   210 kg
Max permissible Weight   440 kg
Ground Clearance   140 mm
Fuel Consumption   4,6 l/100 km (at constant 90 kph)
Top Speed   178 kph
Acceleration 0-100 kph   6 sec