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R 100 S
   
. Data sheet
. Back to Models
Production
Begin of Production   1976
End of Production   1978
Number Sold   11.762
Price   10.190,- DM
Engine
Motor Type   four-stroke, two-cylinder, horizontally-opposed "Boxer" engine, air-cooled
Bore x Stroke   94 x 70,6 mm
Cubic Capacity   980 ccm
Max Power   65 hp (48 KW) [1978: 70 hp (51 KW)] at 6600 rpm (1978: 7250 rpm)
Max Torque   75 Nm [1978: 77 Nm] at 5500 rpm
Compression Ratio   9.5 : 1
Valves per Cylinder   2
Valve Control   ohv, using push rod and rocker arm
Carburation System   2 constant depression carburettors, Bing 94/40/103-104 or 105-106
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 : 2.91 or 1 : 3.0
Bevel / Crownwheel   11 / 32 teeth or 11 / 33 teeth
Electrical system
Ignition   battery ignition
Alternator   Bosch 12 V/240 W
Starter   Bosch 0.6 hp
Spark Plugs   Bosch W 225 T 30/Beru 230/14/3 A/Champion N 6 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   2.15 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 [1978: single disc brake 260 mm dia]
Dimensions / Weights
Length x Width x Height   2130 x 746 x 1210 mm
Wheel Base   1465 mm
Tank Capacity   24 l
Unladen Weight, full Tank   220 kg
Max permissible Weight   398 kg
Ground Clearance   165 mm
Fuel Consumption   5,45 l/100 km [70 PS: 5,75 l] (at constant 90 kph)
Top Speed   200 kph
Acceleration 0-100 kph   4,7 sec (70 hp: 4,6 sec)