BMW R 90S (1973-76) technical specifications

BMW R 90S is produced in 1973-76. Engine is Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder., displacement 898 cc / 54.8 cu in. , produces power 48.8 kW / 67 hp @ 7000 rpm and 76 Nm / 7.6 kgf-m / 55 ft-lb @ 5500 rpm. BMW R 90S top speed is 200 km/h / 124 mph. BMW R 90S wet weight is 215 Kg / 473 lbs. BMW R 90S has 6 photos.

Technical specifications

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Model:	R 90S
Years:	1973-76
Production:	17465 units
Engine:	Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.
Capacity:	898 cc / 54.8 cu in.
Bore x Stroke:	90 x 70.6 mm
Cooling System:	Air cooled
Compression Ratio:	9.5:1
Lubrication:	Gear driven pump
Induction:	2 x slide Dell'Orto PHM 38 carburetors
Ignition:	Kettering
Charging System:	12V 280W alternator
Starting:	Electric
Clutch:	Dry single plate, with diaphragm spring
Max Power:	48.8 kW / 67 hp @ 7000 rpm
Max Torque:	76 Nm / 7.6 kgf-m / 55 ft-lb @ 5500 rpm
Transmission:	5 Speed
Final Drive:	Shaft
Gear Ratios:	1st 4.40 / 2nd 2.86 / 3rd 2.07 / 4th 1.67:1 / 5th 1.50:1
Frame:	Double-loop tubular frame with bolt-on rear section
Front Suspension:	Telescopic fork with hydraulic shock absorber
Front Wheel Travel:	208 mm / 8.1 in
Rear Suspension:	Long swinging arm with adjustable strut.
Rear Wheel Travel:	125 mm / 4.9 in
Front Brakes:	2 x ∅260mm discs, 1 piston caliper
Rear Brakes:	∅200mm Drum
Front Wheel:	1.85 - B19
Rear Wheel:	2.15 - B18
Front Tyre:	3.25 - H19
Rear Tyre:	4.00 - H18
Dimensions:	Length 2180 mm / 85.82 in Width 740 mm / 29.13 in Height 1210 mm / 47.63 in
Wheelbase:	1465 mm / 57.67 in
Seat Height:	820 mm / 32.2 in
Ground Clearance:	165 mm / 6.49 in
Wet Weight:	215 Kg / 473 lbs
Fuel Capacity:	24 Litres / 6.3 US gal
Consumption Average:	5.1 L/100 km / 19.6 km/l / 46 mpg
Standing ¼ Mile:	13.3 sec / 163 km/h / 101 mph
Top Speed:	200 km/h / 124 mph
Road Test:	Cycle 1976