BMW R 90/6

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BMW R 90/6
Manufacturer BMW
Production 1973
Class Naked
Engine air-cooled, four-stroke, two cylinder boxer, 2 valves per cylinder
Bore / Stroke 88.9mm x 88.9mm
Compression ratio 9.0:1
Horse Power 59.94 HP (44.7 KW) @ 6500RPM
Torque 53.84 ft/lbs (73.0 Nm) @ 5500RPM
Transmission Gear box: 5-speed, manual

Final Drive: shaft

Clutch: dry, single plate, diaphragm spring
Suspension Front: telescopic hydraulic fork
Rear: dual adjustable shocks
Brakes Front: single 260mm disc, 1-piston caliper
Rear: 200mm drum
Front Tire 3.25 - H19
Rear Tire 4.00 - H18
Wheelbase 57.6 inches (1463 mm)
Dimensions L 85.79 inches (2179 mm)
W 29.09 inches (739 mm)
Seat height 31.89 inches (810 mm)
Weight  (dry), 210.0 kg (wet)
Manuals Service Manual
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The BMW R 90/6 was a air-cooled, four-stroke, two cylinder boxer, 2 valves per cylinder Naked motorcycle produced by BMW in 1973. Max torque was 53.84 ft/lbs (73.0 Nm) @ 5500 RPM. Claimed horsepower was 59.94 HP (44.7 KW) @ 6500 RPM.


A 88.9mm bore x 88.9mm stroke result in a displacement of just 898.0 cubic centimeters.


The bike has a 5-speed, manual transmission. Power was moderated via the dry, single plate, diaphragm spring.


It came with a 3.25 - H19 front tire and a 4.00 - H18 rear tire. Stopping was achieved via single 260mm disc, 1-piston caliper in the front and a 200mm drum in the rear. The front suspension was a telescopic hydraulic fork while the rear was equipped with a dual adjustable shocks. The wheelbase was 57.6 inches (1463 mm) long.

1973 - 1976 BMW R 90/6[edit]

1973 - 1976 BMW R 90/6 1973 - 1976 BMW R 90/6 1973 - 1976 BMW R 90/6

The 1973 BMW R 90/6 has, at its heart, an air-cooled, four-stroke, 898cc, two cylinder boxer powerhouse paired to a five-speed manual transmission that can reach a maximum power output of 60 horsepower and 73 Nm of torque.

In addition, it boasts standard fittings such as a telescopic hydraulic front fork, dual shock absorbers as a rear suspension, a front disc brake coupled to a drum rear unit, a dual seat with pillion grab rails, a large, round headlight, laced wheels, a dual exhaust system and an analogue instrument cluster.

In Media[edit]