Model: R 4 Series 2
Production  
Engine  
Power transmission  
Electrical System  
Chassis  
Dimensions/Weights  
     
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Production  
Start of Production 1933
End of Production 1933
Number Sold 1737
Price 1150,-RM
Engine  
Internal Designation M 69 S 2
Motor Type four-stroke single-cyclinder vertical
Bore x Stroke 84 x 78 mm
Displacement 398 ccm
Max Power 12hp at 4000 rpm
Compression Ratio 5.7 : 1
Valves

ohv

Carburetion System 1 x register carburettor Sum type C K 3/500
Engine Lubricating System forced-feed lubrication
Oil Pump gear pump
Power Transmission  
Clutch single-plate, dry
Number of Gears 4
Shifting Manual (frame shift gate)
Gearbox Ratios 3.6 / 2.18 / 1.35 / 1.1
Rear Wheel Ratio 1 : 5.11 (with sidecar 1 : 5.63)
Bevel / Crownwheel 9 / 46 teeth (with sidecar 8 / 45 teeth
Electrical System  
Ignition System battery ignition
Generator Bosch 6 V/30 W
Spark Plugs Bosch DM 175/1
Chassis  
Designation F 69 S 2
Frame

pressed steel duplex frame

Front Wheel Suspension plate spring, 9 laminae, with friction shock absorber
Rear Wheel Suspension rigid
Wheel Rims 26 x 3.5
Tyres Front 26 x 3.5 SS
Tyres Rear 26 x 3.5 SS
Brakes Front drum brake Ø 180mm
Brakes Rear drum brake Ø 180mm
Dimensions/Weights   
Length x Width x Height 1980 x 850 x 950 mm
Wheel Base 1300mm
Fuel Tank Capacity 10 litres
Unladen Weight, Full Tank 137 kg
Permitted Weight Limit 200 kg
Fuel Consumption approx. 3.5 l/100km
Oil Consumption approx. 1 - 2 l/1000km
Top Speed 100 kph