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R 80/7
   
. Data sheet
. Back to Models
Production
Begin of Production   1977
End of Production   1984
Number Sold   18.522
Price   7.990,- 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   55 hp (40 KW) [50 hp (37 KW)] at 7000 rpm [7250 rpm]
Max Torque   64 Nm [58 Nm] at 5500 rpm [5500 rpm]
Compression Ratio   9.2 : 1 [8.2 : 1]
Valves per Cylinder   2
Valve Control   ohv, using push rod and rocker arm
Carburation System   2 constant depression carburettors, Bing 64/32/201-64/32/202
Engine Lubrication   wet sump
Power transmission
Clutch   dry single plate, with 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 (optional sport version 3.38 / 2.43 / 1.93 / 1.67 / 1.50)
Rear Wheel Ratio   1 : 3.20 or 1 : 3.36
Bevel / Crownwheel   10 / 32 teeth or 11 / 37 teeth
Electrical system
Ignition   battery ignition
Alternator   Bosch 12 V/280 W
Starter   Bosch 0.7 kW
Spark Plugs   Bosch W 175 T 30/Beru 175/14/3 A/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   long swinging arm with adjustable strut
Spring Travel front/rear   200 / 125 mm
Rims front   1.85 B 19
Rims rear   2.50 B 18
Tyres front   3.25 H 19
Tyres rear   4.00 H 18
Brakes front   dual-disc brake 260 mm dia
Brakes rear   simplex drum brake 200 mm dia
Dimensions / Weights
Length x Width x Height   2180 (from 1978: 2210) x 746 x 1080 mm
Wheel Base   1465 mm
Tank Capacity   24 l
UnladenWeight, full Tank   215 kg
Max permissible Weight   398 kg
Ground Clearance   165 mm
Fuel Consumption   4,75 l/100 km [5,0l /100 km] (at constant 90 kph)
Top Speed   180 kph [170 kph]
Acceleration 0-100 kph   5,9 sec [6,4 sec]