1974 R90S BMW Motorcycle Specs

– 1974 BMW R90S

MANUFACTURER SPECIFICATIONS

Manufacturer – Make – Model – Year: BMW R 90 S 1974
Motorcycle Style: Sport touring

ENGINE SPECS

Engine Type: 898 cc, air cooled, 2 – cylinders boxer, 4-stroke
Engine Bore and Stroke: 90 mm x 70.6 mm
Compression ratio 9,5:1
Valves ohv, using push rod and rocker arm , 2 valves/cylinder
Fuel system 2 slide carburettors, Dellorto PHM 38 AS-AD or 38 BS-BD
Ignition battery ignition
Horsepower: 67 hp (50 kW) @ 7000 rpm
Torque 76 Nm (56.1 ft. lbs) @ 5500 rpm

Clutch dry single plate, with diaphragm spring
Transmission type: 5 speed
Gear Ratios: 1st 4.4, 2nd 2.86, 3th 2.07, 4th 1.67, 5th 1.5
Primary drive 3.00 or 2.91
Final Drive: Shaft , 11 / 33 or 11 / 32
Starting system Electronic

CHASSIS SPECS

Frame double-loop tubular frame with bolt-on rear section
Suspension – Front: telescopic fork with hydraulic shock absorber , 208 mm travel
Suspension – Rear: long swinging arm with adjustable strut , 125 mm travel

MISCELLANEOUS SPECS

Tire – Front: 3,00-21
Tire – Rear: 4,00-18
Brakes – Front: 260 mm drum
Brakes – Rear: 200 mm drum

DIMENSIONS

Overall length 2180 mm (85.8 inches)
Overall width 740 mm (29.1 inches)
Overall height 1210 mm (47.6 inches)
Wheelbase 1465 mm (57.7 inches)
Ground clearance 165 mm (6.5 inches)
Fuel capacity – reserve 24 l (6.3 gallon US)
Dry weight 215 kg (474 pounds)