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R 80

R 80
. Data sheet
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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
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