Technical specifications
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| Model: |
R 4 |
| Years: |
1932-37 |
|
Engine:
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Four stroke, single cylinder vertical
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Capacity:
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498 cc / 30.4 cu in.
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|
Bore x Stroke:
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84 x 78 mm
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Compression Ratio:
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5.7:1
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Cooling System:
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Air cooled
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Induction:
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1 x carburetor type SUM CK 3/500 Fr
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Ignition:
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Battery ignition
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Starting:
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Kick
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Generator:
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Bosch 6V/45W
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Clutch:
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Single plate, dry
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Max Power:
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10.4 kW / 14hp @ 4000 rpm
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Transmission:
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4 Speed
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Final Drive:
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Shaft
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Gear Ratio:
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1st 3.6 / 2nd 2.28 / 3rd 1.70 / 4th 1.30:1
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Frame:
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Pressed steel duplex frame
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Front Suspension:
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Plate spring, 9 laminae with 2 friction shock absorbers
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Rear Suspension:
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Rigid, sping loaded saddle
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Front Brake:
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∅160mm Drum
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Rear Brakes:
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∅160mm Drum
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Front Tyre:
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3.50 x 26" SS
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Rear Tyre:
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3.50 x 26" SS
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Wet-Weight:
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137 kg / 302 lbs
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Fuel Capacity:
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12 L / 3.2 US gal
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