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R 90 /6

R 90/6
. Data sheet
. Back to Models
Production
Begin of Production 1973
End of Production 1976
Number Sold 21.097
Price 7.620,- DM
Engine
Motor Type four-stroke, two-cylinder, horizontally-opposed "Boxer" engine, air-cooled
Bore x Stroke 90 x 70,6 mm
Cubic Capacity 898 ccm
Max Power 60 hp (44,1 KW) at 6500 rpm
Max Torque 73 Nm at 5500 rpm
Compression Ratio 9.0 : 1
Valves per Cylinder 2
Valve Control ohv, using push rod and rocker arm
Carburation System 2 constant depression carburettors, Bing 64/32/11-12
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
Rear Wheel Ratio 1 : 3.09 or 1 : 3.2
Bevel / Crownwheel 11 / 34 teeth or 10 / 32 teeth
Electrical system
Ignition battery ignition
Alternator Bosch 12 V/280 W
Starter Bosch 0.5 hp
Spark Plugs Bosch W 200 T 30/Beru 200/14/3 A/Champion N 7 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 208 / 125 mm
Rims front 1.85 B 19
Rims rear 2.15 B 18
Tyres front 3.25 H 19
Tyres rear 4.00 H 18
Brakes front single disc brake 260 mm dia
Brakes rear simplex drum brake 200 mm dia
Dimensions / Weights
Length x Width x Height 2180 x 740 x 1080 mm
Wheel Base 1465 mm
Tank Capacity 18 l (optional 22 tank at extra charge)
Unladen Weight, full Tank 210 kg
Max permissible Weight 398 kg
Ground Clearance 165 mm
Fuel Consumption 5,5 l/100 km (at constant 90 kph)
Top Speed 188 kph
Acceleration 0-100 kph 5,2 sec
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