Technical specifications
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| Model: |
R 39 |
| Years: |
1925-27 |
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Engine:
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Four stroke, single cylinder vertical, OHV
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Capacity:
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247 cc / 15.1 cu in.
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Compression Ratio:
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6.0:1
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Cooling System:
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Air cooled
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Induction:
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1 x BMW Spezial ∅20 mm
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Ignition:
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Bosch magneto generator type G 1.8V/15W
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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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4.8 kW / 6.5 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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Frame:
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Twin loop tubular frame
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Front Suspension:
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Plate spring, 4 laminae
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Rear Suspension:
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Rigid, spring loaded saddle
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Front Brakes:
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Internal shoe drum brake ∅150 mm / ∅5.90 in diameter
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Rear Brakes:
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External shoe brake at the gearing on Cardan shaft
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Front Tyre:
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27 x 3.5" balloon or with 26 x 3.0" high pressure tyres
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Rear Tyre:
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27 x 3.5" balloon or with 26 x 3.0" high pressure tyres
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Wet-Weight:
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110 kg / 242 lbs
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Fuel Capacity:
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10 liters / 2.6 US gal
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