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R 45
   
. Data sheet
. Back to Models
Production
Begin of Production   1978
End of Production   1985
Number Sold   28.158
Price   5.880,- DM
Engine
Motor Type   four-stroke, two-cylinder, horizontally-opposed "Boxer" engine, air-cooled
Bore x Stroke   70 x 61,5 mm
Cubic Capacity   473,4 ccm
Max Power   35 hp (26 KW) [27 hp (20 KW)] at 7250 rpm [6500 rpm]
Max Torque   37,5 Nm [31,3 Nm] at 5500 rpm [5000 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 64/28/303-304 [Bing 64/26/303-304]
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 : 3.89 [1 : 4.25]
Bevel / Crownwheel   9 / 35 teeth [8 / 34 teeth]
Electrical system
Ignition   battery ignition
Alternator   Bosch 280 W
Starter   Bosch 0.7 kW
Spark Plugs   Bosch W 5 D/Beru 14-5D/Champion N 6 Y [Bosch W 7 D/Beru 14-7 D/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   175 / 110 mm
Rims front   1.85 B 18
Rims rear   2.50 B 18
Tyres front   3.25 S 18
Tyres rear   4.00 S 18
Brakes front   single disc brake 260 mm dia
Brakes rear   simplex drum brake 200 mm dia
Dimensions / Weights
Length x Width x Height   2110 x 688 x 1080 mm
Wheel Base   1400 mm
Tank Capacity   22 l
Unladen Weight, full Tank   205 kg
Max permissible Weight   398 kg
Ground Clearance   130 mm
Fuel Consumption   5,5 l/100 km [5,0 l/100 km] (at constant 90 kph)
Top Speed   160 kph [145 kph]
Acceleration 0-100 kph   7,4 sec [8,5 sec]