BMW R 42 (1926-28) technical specifications
BMW R 42 is produced in 1926-28. Engine is Four stroke, two cylinder horizontally opposed Boxer, pushrod operated, SV, displacement 494 cc / 30.1 cu in. , produces power 8.9kW / 12 hp @ 3400 rpm. BMW R 42 wet weight is 126 kg / 277 lbs. BMW R 42 has 2 photos.
Technical specifications
+ Add to 'Compare list'| Model: | R 42 |
| Years: | 1926-28 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated, SV |
| Capacity: | 494 cc / 30.1 cu in. |
| Bore x Stroke: | 68 x 68 mm |
| Compression Ratio: | 4.9:1 |
| Cooling System: | Air cooled |
| Induction: | 1 x BMW Spezial 2 valve, ∅22 mm |
| Ignition: | Bosch magneto ignition |
| Starting: | Kick |
| Clutch: | Single plate saucer spring, dry |
| Max Power: | 8.9kW / 12 hp @ 3400 rpm |
| Transmission: | 3 Speed |
| Final Drive: | Shaft |
| Gear Ratio: | 1st 2.50 / 2nd 1.50 / 3rd 1.07:1 |
| Frame: | Twin loop steel tubular frame |
| Front Suspension: | Plate spring, 5 laminae |
| Rear Suspension: | Rigid, Spring loaded saddle |
| Front Brakes: | ∅150mm Drum |
| Rear Brakes: | External shoe brake at the gearing on Cardan shaft |
| Front Tyre: | 27 x 3.5" low pressure or 26 x 3.0" high pressure |
| Rear Tyre: | 27 x 3.5" low pressure or 26 x 3.0" high pressure |
| Wet-Weight: | 126 kg / 277 lbs |
| Fuel Capacity: | 14 liters / 3.6 US gal |
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