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BMW R 90 S (1973-1976) Specs, Performance & Photos

Segment: Naked / Road
Production years: 1973, 1974, 1975, 1976

BMW R 90 S 1973-1976 6 Photos
BMW R 90 S (1973-1976)BMW R 90 S (1973-1976)BMW R 90 S (1973-1976)BMW R 90 S (1973-1976)BMW R 90 S (1973-1976)BMW R 90 S (1973-1976)

In 1973, BMW released the R 90 S model as the flagship model of the revised /6 series and ranked among the fastest series motorcycles in the world with a top speed of 200 kph (124 mph). This was possible due to the 67 hp achieved by boosting the two-cylinder boxer engine to 900cc and with the help of Dell’orto carburetors.

To keep the high performance under control, BMW fitted the bike with a double disc brake system on the front wheel, which was a first on the motorcycle market.

For this model, BMW hired for the first time a designer which created a profile for the bike that set it apart from other motorcycles in the market with the world’s first cockpit fairing attached to the handlebar, a tank designed with flowing contours, and a characteristic bench seat.

In 1975, BMW introduced a new livery for the bike with the Daytona Orange that became a favorite among collectors.

The 1973 BMW R 90 S featured an 898cc air-cooled four-stroke two-cylinder boxer engine with a power output of 67 hp at 7,000 rpm and 76 Nm (56 lb-ft) of torque at 5,000 rpm.

The bike came with standard features such as a dual seat, a pillion grab rail, a nose-fairing with a windscreen, a dual exhaust system, an analog instrumentation panel, wire-spoked wheels, and a side stand.

BMW R 90 S 1973-1976

BMW R 90 S 898

engine specs
Type:air-cooled, four-stroke, two cylinder boxer, 2 valves per cylinder
Displacement:898 cm3
Bore X Stroke:3.5x2.8 in OR 89 mm
Compression Ratio:9.5:1
Horsepower:67/7000 KW(hp)/RPM
Torque:56/5500 lb-ft/RPM OR 76/5500 Nm/RPM
Fuel System:2xDellOrto PHM 38 carburetors
transmission specs
Gearbox:5-speed, manual
Clutch:dry, single plate, diaphragm spring
Primary Drive:-
Final Drive:shaft
chassis specs
Frame:steel
Front Suspension:telescopic hydraulic fork
Rear Suspension:dual adjustable shocks
Front Brake:dual 260mm discs, 1-piston calipers
Rear Brake:200mm drum
dimension specs
Overall Length:85.8 in OR 2179 mm
Overall Width:29.1 in OR 739 mm
Seat Height:32.2 in OR 818 mm
Wheelbase:57.7 in OR 1466 mm
Ground Clearance:6.5 in OR 165 mm
Weight:474 lbs OR 215 kg
Fuel Capacity:6.3 gallons OR 23.8 L
tyres specs
Front:3.25 - H19
Rear:4.00 - H18
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