BMW R100GS

                                    1988 R100GS


Date 1986 - 1996

Number sold 34,007

Price 12,990.- DM

   $7,393 in 1988 dollars
$14,175 in 2011 dollars


Engine

Type four-stroke, two-cylinder, flat twin (boxer)
Bore/stroke 94 x 70.6 mm
Cubic capacity 980 cm3 / 59.5 inches3
Max power 60 HP at 6500 rpm
Max torque 76 Nm (56 ft-lb) at 3750 rpm
Compression ratio 8.5 : 1
Valves per cylinder 2 ohv
Carburation system 2 constant depression carburetors, Bing 94/40/123 - 94/40/124
Engine lubrication wet sump

 
Power transmission

Clutch dry single plate, with diaphragm spring
Number of gears 5
Shifting dog type gearbox, ratchet foot lever
Gear ratios 4.4 / 2.86 / 1.67 / 1.50 / 1:309
Rear wheel ratio 1 : 3.09
Bevel/crown wheel 11 / 34 teeth

 
Electrical system

Alternator Bosch 280W, 12 volts
Ignition Bosch electronic ignition
Spark plugs Bosch W7CC, Beru 14-7DU, NGK BP6ES, Champion N9YC
Starter Bosch 0.7 Kw
Battery 12 volts, 25-30 ampere-hours

 
Suspension

Type of frame double-loop tubular frame, bolt-on rear section
Front suspension telescopic fork with hydrauic damper
Rear suspension BMW Paralever swinging arm
Wheel rims 1.85-21 MTH 2 / 2.50-17 MTH 2
Tires front 90/90 21 T — pressure 31 psi solo / 34 psi two-up
Tires rear 130/80 17 T — pressure 36 psi solo / 41 psi two-up
Brakes front single disk, 285 mm / 11.2" diameter, Brembo 2 piston caliper
Brakes rear simplex drum, 200mm / 7.8" diameter

 
Dimensions and weights

Length x width x height 90 x 39.4 x 45.9 inches / 2290 x 1000 x 1165 mm
Wheel base 59.6 inches / 1514 mm
Fuel tank capacity 5.7 gals. / 21.7 liters, including 1.23 gal. reserve
Oil capacity 2.5 quarts / 2.6 liters
Unladen weight, full tank 462 lbs. / 210 kg
Load rating 925 lbs. / 420 kg
Ground clearance 7.87 inches / 200 mm
Seat height 33.5 inches / 850 mm
Fuel consumption 48 MPG (ca. 4.9 liters / 100 km)
Acceleration 0 to 62 MPH (0-100 km/h) — 4.8 seconds
Top speed 112 MPH / 181 km/h