Model: R 12 1 Carburettor
Production  
Engine  
Power transmission  
Electrical System  
Chassis  
Dimensions/Weights  
     
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Production  
Start of Production 1935
End of Production 1942
Number Sold 36000 (single and double-carburettor versions)
Price 1630,-RM
Engine  
Internal Designation M 56 S 6 or 212
Motor Type four-stroke two-cyclinder flat-twin
Bore x Stroke 78 x 78 mm
Displacement 745 ccm
Max Power 18 hp at 3400 rpm
Compression Ratio 5.2 : 1
Valves

sv
Carburetion System 1 x Sum CK, 25mm
Engine Lubricating System forced-feed lubrication
Oil Pump gear pump
Power Transmission  
Clutch double plates, dry
Number of Gears 4
Shifting Manual
Gearbox Ratios 3.18 / 2.06 / 1.42 / 1.09
Rear Wheel Ratio 1 : 4.07 (with sidecar 1 : 4.75)
Bevel / Crownwheel 14 / 57 teeth ( sidecar 12 / 57
Electrical System  
Ignition System battery ignition , optionally magneto ignition
Generator Bosch D 2 BRS 170
Spark Plugs Bosch M 175 or Bosch W 175 T1
Chassis  
Designation F 66
Frame

twin-loop pressed steel frame

Front Wheel Suspension telescopic fork
Rear Wheel Suspension rigid
Wheel Rims 3 x 19
Tyres Front

3.5 x 19

Tyres Rear

3.5 x 19

Brakes Front drum brake Ø 200mm
Brakes Rear drum brake Ø 200mm
Dimensions/Weights   
Length x Width x Height 2100 x 900 x 940 mm
Wheel Base 1380 mm
Fuel Tank Capacity 14 litres
Unladen Weight, Full Tank approx. 185 kg
Permitted Weight Limit 300 kg
Fuel Consumption approx. 3.5 - 4 l/100km
Oil Consumption approx. 1 - 2 l/1000km
Top Speed 110 kph