| MODEL | BMW R 75/5 1972 - 1973 |
| Year | 1972 - 1973 |
| Engine Type | Four stroke, two cylinder horizontally opposed boxer, OHV pushrod, 2 valves per cylinder |
| Displacement / Capacity | 745 cc / 45.5 cu in |
| Bore X Stroke | 82 x 70.6 mm |
| Compression Ratio | 9.0:1 |
| Cooling System | Air cooled |
| Max Power | 37 kW / 50 hp @ 6200 rpm |
| Max Torque | 59 Nm / 43.5 lb-ft @ 5000 rpm |
| Ignition | Battery and coil ignition |
| Induction | 2 x Bing 32 mm constant-depression (CV) carburettors |
| Start System | Electric and kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4 Speed |
| Clutch | Single plate, dry |
| Final Drive | Shaft |
| CHASSIS SPECS | |
| Frame | Double loop steel tube frame with bolted-on rear subframe |
| Front Suspension | Telescopic hydraulic fork, 208 mm / 8.2 in travel |
| Rear Suspension | Swingarm with twin shock absorbers, 125 mm / 4.9 in travel |
| Front Brakes | ∅200 mm duplex (twin leading shoe) drum |
| Rear Brakes | ∅200 mm simplex drum |
| DIMENSION SPECS | |
| Overall Length | 2100 mm / 82.7 in (2150 mm / 84.6 in on late-1973 long-wheelbase bikes) |
| Overall Width | 850 mm / 33.5 in |
| Overall Height | 1040 mm / 40.9 in |
| Seat Height | — |
| Wheelbase | 1385 mm / 54.5 in (1435 mm / 56.5 in on late-1973 long-wheelbase bikes) |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 210 kg / 463 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.25 - S19 |
| Rear Tyre | 4.00 - S18 |
| FUEL SYSTEM | |
| Fuel Capacity | 17 Litres / 4.5 US gal (24 L optional) |
| Fuel Consumption | — |
| Top Speed | 175 km/h / 109 mph |
The 1972-1973 R75/5 is best known for its smaller tank with chrome side panels, nicknamed the 'toaster', and H4 headlamps became available in 1972. Late in 1973 production BMW lengthened the swingarm and rear frame to improve high-speed stability on motorways, creating the long-wheelbase bikes that the /6 series carried on.
