BMW R90/6 (1973-76)

Make Model: BMW R 90/6


Year: 1973-76
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: 9.0:1
Lubrication: Gear driven pump
Induction: 2 x Bing constant depression carburetors
Ignition: Battery ignition
Spark Plug: Bosch W 200 T 30 / Beru 200/14/3 A / Champion N7Y
Charging System: 12V 280W alternator
Starting: Electric
Max Power: 44.1 kW / 60 hp @ 6500 rpm
Max Torque: 73 Nm / 7.44 kgf-m / 53 ft lb @ 5500 rpm
Clutch: Dry single plate, with diaphragm spring
Transmission: 5 Speed
Final Drive: Shaft
Gear Ratios: 1st 4.40 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50:1
Rear Wheel Ratio: 1:3.09 or 1:3.2
Frame: Double loop tubular frame with bolt on rear section
Front Suspension: Telescopic hydraulic forks.

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: Single 260mm disc, 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 1080 mm / 42.5 in
Wheelbase: 1465 mm / 57.67 in
Seat Height: 810 mm / 31.9 in
Wet Weight: 210 kg / 462 lbs
Fuel Capacity: 18 Liters / 4.75 US gal


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