| MODEL | BMW R 90/6 1973 - 1976 |
| Year | 1973 - 1976 |
| Engine Type | Four stroke, two-cylinder horizontally-opposed Boxer, pushrod, 2 valves per cylinder |
| Displacement / Capacity | 898 cc / 54.8 cu in |
| Bore X Stroke | 90 x 70.6 mm |
| Compression Ratio | 9.0:1 |
| Cooling System | Air-cooled |
| Max Power | 44 kW / 60 hp @ 6500 rpm |
| Max Torque | 73 Nm / 7.44 kgf-m / 53 ft-lb @ 5500 rpm |
| Ignition | Battery and coil |
| Induction | 2 x Bing constant-depression carburettors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Gear-driven pump |
| Gear Box | 5 Speed |
| Clutch | Dry single plate, diaphragm spring |
| Final Drive | Shaft |
| CHASSIS SPECS | |
| Frame | Double-loop tubular frame with bolt-on rear section |
| Front Suspension | Telescopic hydraulic fork, 208 mm / 8.1 in travel |
| Rear Suspension | Long swinging arm with adjustable shocks, 125 mm / 4.9 in travel |
| Front Brakes | Single 260 mm disc, 1-piston caliper |
| Rear Brakes | 200 mm drum |
| DIMENSION SPECS | |
| Overall Length | 2180 mm / 85.8 in |
| Overall Width | 740 mm / 29.1 in |
| Overall Height | 1080 mm / 42.5 in |
| Seat Height | 810 mm / 31.9 in |
| Wheelbase | 1465 mm / 57.7 in |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 210 kg / 462 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.25 H19 |
| Rear Tyre | 4.00 H18 |
| FUEL SYSTEM | |
| Fuel Capacity | 18 Litres / 4.75 US gal |
| Fuel Consumption | — |
| Top Speed | 188 km/h / 117 mph |
The R 90/6 was the 900 cc touring model of the 1973 /6 range, sharing the new five-speed gearbox and front disc brake with its siblings but running Bing constant-depression carburettors and a milder 9:1 compression. Overshadowed at launch by the faired R 90 S, it was a relaxed, low-revving long-distance bike and is credited by BMW as the first motorcycle with an H4 headlamp as standard.
