Technical specifications
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| Model: |
R 57 |
| Years: |
1928-30 |
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Engine:
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Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.
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Capacity:
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494 cc / 30.1 cu in.
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Bore x Stroke:
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68 x 68 mm
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Compression Ratio:
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5.8:1
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Induction:
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1 x Spezial two valve ∅24 mm carburetor
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Ignition:
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Bosch high voltage magneto ignition
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Starting:
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Kick
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Clutch:
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Single plate, dry
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Max Power:
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13.4 kW / 18 hp @ 4000 rpm
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Transmission:
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3 Speed
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Final Drive:
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Shaft
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Gear Ratio:
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1st 2.83 / 2nd 1.55 / 3rd 1.08
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Frame:
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Twin loop steel tubular frame
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Front Suspension:
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Plate spring, 6 laminae
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Rear Suspension:
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Rigid
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Front Brakes:
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∅200mm Drum
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Rear Brakes:
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Block brake
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Front Tyre:
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26 x 3.5" low pressure or 26 x 3.5" high pressure
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Rear Tyre:
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26 x 3.5" low pressure or 26 x 3.5" high pressure
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Wet-Weight:
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150 kg / 330 lb
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Fuel Capacity:
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12.5 liters / 3.3 US gal
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