BMW R 90/6 (1973-76) technical specifications

Model:	R 90/6
Years:	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

Engine:

Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.

Bore x Stroke:

90 x 70.6 mm

Compression Ratio:

9.0:1

Induction:

2 x Bing constant depression carburetors

Spark Plug:

Bosch W 200 T 30 / Beru 200/14/3 A / Champion N7Y

Starting:

Electric

Max Torque:

73 Nm / 7.44 kgf-m / 53 ft lb @ 5500 rpm

Transmission:

5 Speed

Gear Ratios:

1st 4.40 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50:1

Frame:

Double loop tubular frame with bolt on rear section

Front Wheel Travel:

208 mm / 8.1 in

Rear Wheel Travel:

125 mm / 4.9 in

Rear Brakes:

200mm Drum

Rear Wheel:

2.15 - B18

Rear Tyre:

4.00 - H18

Wheelbase:

1465 mm / 57.67 in

Wet Weight:

210 kg / 462 lbs

Technical specifications