BMW R 90 S. Begin of Production. 1973. End of Production. 1976. Engine. Motor
Type four-stroke, two-cylinder, horizontally-opposed Boxer engine, air-cooled.
Engine
Begin of Production End of Production Motor Type
Engine Lubrication Clutch Number of Gears Gear Selection Gear Ratios Rear Wheel Ratio Bevel/Crownwheel Ignition Alternator Starter Spark Plugs Type of Frame Front Suspension Rear Suspension Spring Travel front/rear Rims front Rims rear Tyres front Tyres rear Brakes front Brakes rear Length
1973 1976 four-stroke, two-cylinder, horizontally-opposed Boxer engine, air-cooled 90 mm 70,6 mm 898 ccm 67 hp (49,3 KW) 7000 rpm 76 Nm 5500 rpm 9.5:1 2 ohv, using push rod and rocker arm 2 slide carburettors, Dellorto PHM 38 AS-AD or 38 BS-BD wet sump dry single plate, with diaphragm spring 5 dog-type gearbox (ratchet foot lever) 4.4/2.86/2.07/1.67/1.50:1 1:3.00 or 1:2.91 11/33 teeth or 11/32 teeth Bosch 12 V/280 W Bosch 0.5 hp battery ignition Bosch W 200 T 30/Beru 200/14/3 A/Champion N 7 Y double-loop tubular frame with bolt-on rear section telescopic fork with hydraulic shock absorber long swinging arm with adjustable strut 208 / 125 mm 1.85 B 20 2.15 B 19 3.25 H 20 4.00 H 19 dual-disc brake 260 mm dia simplex drum brake 200 mm dia 2180 mm
Width Height Wheel Base Ground Clearance Tank Capacity Unladen Weight, full Tank Max permissible Weight Fuel Consumption Acceleration 0-100 kph Top Speed Number Sold Price
740 mm 1210 mm 1465 mm 165 mm 24 l 215 kg 398 kg 5,0 l/100 km (at constant 90 kph) 4,8 sec 200 kph 17.465 9.130,- DM
Bore Stroke Cubic Capacity Max Power Rpm (Max Power) Max Torque Rpm (Max Torque) Compression Ratio Valves per Cylinder Valve Control Carburation System
