|
Engine |
|
Internal designation |
M 2 B 33 |
|
Type |
four-stroke two-cylinder flat twin (boxer) |
|
Bore/stroke |
68 x 68 mm |
|
Cubic capacity |
494 cm3
/ 30 in.3 |
|
Maximum power |
8.5 HP at 3,200 RPMs |
|
Compression ratio |
5.0 : 1 |
|
Valves per cylinder |
2 SV |
|
Carburetion system |
1 carburettor Type BMW Spezial 22mm |
|
Engine lubrication |
forced-feed lubrication |
|
Oil pump |
gear pump |
|
Power transmission |
|
Clutch |
single discs, dry |
|
Number of gears |
3 |
|
Shifting |
manual |
|
Gear ratios |
2.27 / 1.50 / 1.08 |
|
Rear wheel ratio |
4.41 : 1 (with sidecar 5.36 : 1) |
|
Bevel/crown wheel |
17 / 75 teeth (with sidecar 14 / 75) |
|
Electrical system |
| Generator |
magneto generator (on request) |
| Ignition |
Bosch magneto ignition |
|
Spark plugs |
Bosch W 145 |
|
Suspension |
|
Designation |
R 32 |
|
Type of frame |
twin-loop, tubular |
|
Front suspension |
twin cantilever spring |
|
Rear suspension |
rigid (none) |
|
Wheel rims |
26 x 2.5 |
|
Tires front |
26 x 3 |
|
Tires rear |
26 x 3 |
|
Brakes front |
drum brake Ø 150 mm (1924 and on) |
|
Brakes rear |
block brake |
| Dimensions and weights |
|
Length x width x height |
82.7 x 31.5 x 37.4 inches
(2100 x 800 x 950 mm) |
|
Wheel base |
54.3 inches
(1380 mm) with sidecar 1415 mm |
|
Tank capacity |
3.7 gals. (14 liters) |
|
Unladen weight, full tank |
269 lbs. / 122 kg |
|
Permitted loading |
not available |
|
Fuel consumption |
78 MPG (± 3 liters / 100 km) |
|
Oil consumption |
± 6.2 quarts / 1000 miles (± 2.5 liters / 1000 km) |
|
Top speed |
± 60 MPH (± 96 km/h) |
