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R11 Series 1

R 11 Series 1
. Data sheet
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Production
Begin of the Production 1929
End of the Production 1930
Numbers Produced 7.500 (series 1-5)
Price 1.750,- RM
Engine
Internal Designation M 56
Motor Type four-stroke two-cylinder 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 24 mm
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 magneto 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 200 mm
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 l
Unladen Weight, Full Tank 162 kg
Load Rating 210 kg
Fuel Consumption approx. 4 - 4,5 l/100 km
Oil Consumption approx. 1 - 2 l/1000 km
Top Speed 95 - 100 kph
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