BMW R4
| Production Year: | 1932, 1933, 1934, 1935, 1936, 1937 |  |
| Type: | air-cooled, four-stroke, single vertical cylinder |
| engine specs | |
| Type | air-cooled, four-stroke, single vertical cylinder |
| Displacement | 498 cm3 |
| Bore X Stroke | 3.3x3.1 in OR 84 mm |
| Compression Ratio | 5.7:1 |
| Horsepower | 12/4000 KW(hp)/RPM |
| Fuel System | carburetor |
| transmission specs | |
| Gearbox | 3-speed, manual |
| Clutch | dry, single plate |
| Final Drive | shaft |
| chassis specs | |
| Frame | steel |
| Front Suspension | parallelogram fork |
| Rear Suspension | hard-tail, sprung seat |
| Front Brake | 160mm drum |
| Rear Brake | 160mm drum |
| dimension specs | |
| Weight | 302 lbs OR 137 kg |
| Fuel Capacity | 3.2 gallons OR 12.1 L |
| tyres specs | |
| Front | 3.50 x 26 |
| Rear | 3.50 x 26 |
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