1975 BMW R90S - A truly majestic Germanic steed from the past

The BMW R90S is a 900cc sport motorcycle produced by BMW from 1973 to 1976. BMW commissioned designer Hans Muthto oversee the R90S, which became the flagship of the boxer engined "/6" range. Sporting distinctive two-tone paintwork, a bikini fairing and a new tail, the R90S was intended to shrug off the enduring image of BMW bikes as staid and utilitarian.

The 67 bhp (50 kW) R90S had a top speed of 124 mph (200 km/h), it ran the quarter mile in around 13.5 seconds and it accelerated from 0 to 62 mph (0–100 km/h) in 4.8 seconds. Maximum torque was delivered at 5,500 rpm and the engine redlined at 7,200 rpm.

MANUFACTURER SPECIFICATIONS
Manufacturer - Make - Model - Year: BMW R 90 S 1975
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 120 mm (4.7 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)