Model: R 11 Series 1
Production  
Engine  
Power transmission  
Electrical System  
Chassis  
Dimensions/Weights  
     
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Production  
Start of Production 1929
End of Production 1930
Number Sold 7500 (series 1-5)
Price 1750,-RM
Engine  
Internal Designation M 56
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 5.5 : 1
Valves

sv
Carburetion System 1 x carburettor type BMW 24mm
Engine Lubricating System forced-feed lubrication
Oil Pump gear pump
Power Transmission  
Clutch single-plate, dry
Number of Gears 3
Shifting Manual
Gearbox Ratios 2.83 / 1.55 / 1.08
Rear Wheel Ratio 1 : 4.07 (with sidecar 1 : 5.18 or 1 : 4.75)
Bevel / Crownwheel 14 / 57 teeth ( sidecar 11 / 57 or 12 / 57
Electrical System  
Ignition System battery ignition
Generator Bosch magneto generator D 2 L or magneto ignition FF2
Spark Plugs Bosch W 175 T1
Chassis  
Designation F 66
Frame

twin-loop pressed steel frame

Front Wheel Suspension plate spring, 9 laminae
Rear Wheel Suspension rigid
Wheel Rims 26 x 3.5 safety rims
Tyres Front

26 x 3.5 low pressure or

26 x 3.25 high pressure
Tyres Rear

26 x 3.5 low pressure or

26 x 3.25 high pressure
Brakes Front drum brake Ø 200mm
Brakes Rear cardan brake, width 37 mm
Dimensions/Weights   
Length x Width x Height 2100 x 890 x 940 mm
Wheel Base 1380 mm
Fuel Tank Capacity 14 litres
Unladen Weight, Full Tank 162 kg
Permitted Weight Limit 210 kg
Fuel Consumption approx. 4 - 4.5l/100km
Oil Consumption approx. 1 - 2 l/1000km
Top Speed 95 - 100 kph