 |
| Production |
|
|
|
| Begin of the Production |
|
1928 |
|
| End of the Production |
|
1929 |
|
| Numbers Produced |
|
4377 |
|
| Price |
|
1.510,- RM |
|
|
 |
 |
|
| Engine |
|
|
|
| Internal Designation |
|
M 57 |
|
| Motor Type |
|
four-stroke two-cylinder flat-twin |
|
| Bore x Stroke |
|
63 x 78 mm |
|
| Displacement |
|
486 ccm |
|
| Max Power |
|
12 hp at 3400 rpm |
|
| Compression Ratio |
|
5.0 : 1 |
|
| Valves |
|
sv |
|
| Carburetion System |
|
1 x carburettor, BMW Spezial two-valve 22 mm |
|
| Engine Lubricating System |
|
forced-feed lubrication |
|
| Oil Pump |
|
gear pump |
|
|
|
|
|
| Power Transmission |
|
|
|
| Clutch |
|
single-plate, dry - from engine no. 50761:two plates |
|
| Number of Gears |
|
3 |
|
| Shifting |
|
manual |
|
| Gearbox Ratios |
|
2.83 / 1.55 / 1.08 |
|
| Rear Wheel Ratio |
|
1 : 4.38 or 1 : 4.75 (with sidecar 1 : 5.7) |
|
| Bevel / Crownwheel |
|
13 / 57 or 12 / 57 teeth (with sidecar 10 / 57) |
|
|
|
|
|
| Electrical System |
|
|
|
| Ignition System |
|
Bosch high-voltage magneto ignition |
|
| Generator |
|
Bosch magneto generator on request |
|
| Spark Plugs |
|
Bosch W 175 |
|
|
|
|
|
| Chassis |
|
|
|
| Designation |
|
F 56 |
|
| Frame |
|
twin-loop steel tubular frame |
|
| Front Wheel Suspension |
|
plate spring, 6 laminae |
|
| Rear Wheel Suspension |
|
rigid |
|
| Wheel Rims |
|
deep-bed 19 x 3 |
|
| Tyres front |
|
26 x 3.5 low pressure or 26 x 3.25 high pressure |
|
| Tyres rear |
|
26 x 3.5 low pressure or 26 x 3.25 high pressure |
|
| Brakes front |
|
drum brake Ø 200 mm |
|
| Brakes rear |
|
external shoe brake at gearing (on cardan shaft) |
|
|
|
|
|
| Dimensions/Weights |
|
|
|
| Length x Width x Height |
|
2100 x 800 x 950 mm |
|
| Wheel Base |
|
1400 mm |
|
| Fuel Tank Capacity |
|
12,5 l |
|
| Unladen Weight, Full Tank |
|
152 kg |
|
| Load Rating |
|
210 kg |
|
| Fuel Consumption |
|
approx. 3,5 l/100 km |
|
| Oil Consumption |
|
approx. 1 - 2 l/1000 km |
|
| Top Speed |
|
100 kph |
|
|
|
|
