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BMW /5
[ My R60/5 | Classic BMW's | F800S | F800ST | F650GS | Index ]
/5 series 1969 - 1973
BMW offered three models in the /5 series, the primary variations in the models being the cylinder displacements. Actual displacement is 498cc for the R50/5, 599cc for the R60/5, and 745cc for the R75/5. The R75/5 was the first machine of that displacement offered by BMW since the end of World War II. Outwardly the three models are almost completely identical. Curb weight according to the 1973 owner's manual is 412 pounds for the R50/5 and 423 pounds for the R60/5 and R75/5 (less fuel). On the two larger displacement machines an electric starter motor is a standard feature; on the R50/5 it is optional. Concentric float carburetors are featured on the R50/5 and R60/5. The R75/5 uses constant vacuum (CV) carburetors with a 32mm choke. Bing is the manufacturer of both types.
My BMW R60/5 (1972-3)
The BMW R60/5 was first introduced to the general public in
1969 - Here are pictures of my R60/5
The R60 slash 5 was a 600cc horizontally opposed
twin cylinder model equipped with dry plate clutch, Bing slide-type
carburetors with 26mm throats and a 4 speed gearbox.
BMW R60/5
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All slash 5 models were air-cooled, four-cycle,
horizontally opposed-twin (boxer) engines with hemispherical
combustion chambers. Their engine housings are one-piece tunnels
housings. The camshaft, driven by a duplex chain, runs at half
engine speed and is located below the crankshaft. Valves are
actuated by the camshaft through hardened followers, push rods,
and rocker arms.
Video about the "new" R75/5 and R90S BMW
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R60/5 Details - 1969 - 1973 |
Bore |
73.5mm |
Stroke |
70.6 mm |
Horsepower |
40hp (29.5 Kw @ 6400 rpm) |
Torque |
49Nm (36ft lb @5000 rpm) |
Carburetor |
Bing 26mm slide
1/26/111 -1/26/112 |
Capacity |
599 cc |
Compression Ratio |
9.2:1 |
Valves |
2 valves per cylinder
ohv, using push rod and rocker arm |
Clutch |
Dry single plate, with diaphragm spring |
Engine Lubrication |
Wet Sump |
Gearbox |
4 speed |
Shifting |
dog-type gearbox (ratchet foot lever) |
Gear ratios |
3,896 / 2,578 / 1,875 / 1,50 : 1 |
Rear wheel ratio |
1 : 3,56 |
Bevel/crown wheel |
11 / 37 teeth |
Top Speed |
103mph - 167kmh |
Tyres -Front |
19" - 3.25 |
Tyres - Rear |
18" - 4,00 S |
Rims Front |
1,85 B 19" |
Rims Rear |
1,85 B 18" or 2,15 B 18" |
Brakes - Front |
Duplex drum brake 200 mm / 7.87 in diameter |
Brakes - Rear |
Simplex drum brake 200 mm / 7.87 in diameter |
Unladen Weight with Full Tank |
210 Kg / 462 lb (from 1971: 205 Kg / 451 lb) |
Max. Permissible Weight |
398 Kg / 876 lb |
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Wheel Base |
1385 mm (from 1973: 1435 mm) |
Ground Clearance |
165 mm ( at 75 kg load) |
Acceleration (0 - 100 Kph / 62 mph) |
8.2 seconds (slow by modern standards) |
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Electrical System |
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Ignition |
Battery Ignition |
Alternator |
12volt 180 Watt (Bosch) |
Starter |
0.5 hp (Bosch) |
Spark Plugs |
Bosch W 230 T 30 / Beru 230/14/3 A / Champion
N7Y |
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Fuel Consumption |
4.8 litres 100Km (at constant 90 Kph) / 58 mpg
/ 49 mpg US |
The R60/5 is currently being restored. One of the major
items is the full Mitchenall Bros Avon fairing fitted by the original
owner Ian Taylor. The fairing has been on the bike since almost its first
days in Victoria and is now very worse for wear. I picked up a new screen
for the fairing in 1996/1997 but have not fitted this to the bike yet.
Here are some pictures
of the fairing condition. The fairing has
been repaired and now needs
to fitted to the bike and some logos added.
Paint Colours used by BMW for the /5 series.
1970 and 1971, the /5 series was available in the following colors:
Color |
Glasurit code |
| Black (schwarz) |
#086 |
| Silver |
#057 |
| White (feder weiss) |
#O84 |
In 1972 and 1973, the /5 series was available in the following colors.
| Color |
Glasurit code |
| Black |
#086 |
| Monza Blue Metallic |
#538 |
| Silver (polaris) |
#060 |
| Granada Red |
#023 |
| Feder Weiss |
#084 |
| Metallic Gold (also called "curry" in the U.S.) |
#029 |
| Metallic Green |
#074 |
Many European police forces used the R75/5 as well. Many were painted a color called "Authority Green" with a Glasurit code of #067.
This series of BMW used a combined Motometer tacho/speedo.
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