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R 20
   
. Data sheet
. Back to Models
Production
Begin of the Production   1937
End of the Production   1938
Numbers Produced   5000
Price   725,- RM
Engine
Internal Designation   220/1
Motor Type   four-stroke single-cylinder vertical
Bore x Stroke   60 x 68 mm
Displacement   192 ccm
Max Power   8 hp at 5400 rpm
Compression Ratio   6.0 : 1
Valves   ohv
Carburetion System   1 x Amal push-in carburettor M 74/428
Engine Lubricating System   forced-feed lubrication
Oil Pump   gear pump
Power transmission
Clutch   single-plate, dry
Number of Gears   3
Shifting   foot switching
Gearbox Ratios   4.55 / 2.58 / 1.64
Rear Wheel Ratio   1 : 4.18
Bevel / Crownwheel   11 / 46 teeth
Electrical system
Ignition System   battery ignition
Generator   Bosch 6 V/50 W
Spark Plugs   Bosch W 175 T1 or Beru K 175
 
Chassis
Designation   220/1
Frame   twin-loop frame, bolted
Front Wheel Suspension   telescopic fork
Rear Wheel Suspension   rigid
WheelRims   25 x 19 deep-bed
Tyres front   3 x 19
Tyres rear   3 x 19
Brakes front   drum brake Ø 160 mm
Brakes rear   drum brake Ø 180 mm
Dimensions / Weights
Length x Width x Height   2000 x 800 x 920 mm
Wheel Base   1330 mm
Fuel Tank Capacity   12 l
Unladen Weight, Full Tank   130 kg
PermittedWeight Limit   200 kg
Fuel Consumption   approx. 2,75 l/100 km
Oil Consumption   approx. 1 - 2 l/1000 km
Top Speed   95 kph