Model: R 100 GS
Production  
Engine  
Power transmission  
Electrical System  
Chassis  
Dimensions/Weights  
     
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Production
Begin of Production   1987
End of Production   1996
Number Sold   34.007
Price   12.990,- 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   60 hp (44 KW) at 6500 rpm
Max Torque   76 Nm at 3750 rpm
Compression Ratio   8.5 : 1
Valves per Cylinder   2
Valve Control   ohv, using push rod and rocker arm
Carburation System   2 constant depression carburettors, Bing 94/40/123-94/40/124
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 : 3.09
Bevel / Crownwheel   11 / 34 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 Paralever swinging arm
Spring Travel front/rear   225 / 180 mm
Rims front   1.85-21 MTH 2
Rims rear   2.50-17 MTH 2
Tyres front   90/90 21 T
Tyres rear   130/80 17 T
Brakes front   single disc brake 285 mm dia
Brakes rear   simplex drum brake 200 mm dia
Dimensions/Weights
Length x Width x Height   2290 x 1000 x 1165 mm [Paris-Dakar: height 1365 mm]
Wheel Base   1514 mm
Tank Capacity   24 l [Paris-Dakar: 35 l]
Unladen Weight, full Tank   210 kg [Paris-Dakar: 236 kg]
Max permissible Weight   420 kg
Ground Clearance   200 mm
Fuel Consumption   4,9 l/100 km (at constant 90 kph)
Top Speed   181 kph [Paris-Dakar: 180 kph]
Acceleration 0-100 kph   4,8 sec