Model: R 25/2
Production  
Engine  
Power transmission  
Electrical System  
Chassis  
Dimensions/Weights  
     
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Production
Begin of the Production   1951
End of the Production   1953
Numbers Produced   38651
Price   1.990,- DM
Engine
Internal Designation   224/3
Motor Type   four-stroke single-cylinder vertical
Bore x Stroke   68 x 68 mm
Displacement   247 ccm
Max Power   12 hp at 5800 rpm
Compression Ratio   6.5 : 1
Valves   ohv
Carburetion System   1 x Bing type 1/22/44 or SAWE type K 22 F
Engine Lubricating System   forced-feed lubrication
Oil Pump   gear pump
Power Transmission
Clutch   single-plate, dry
Number of Gears   4
Shifting   foot switching (+ auxiliary manual switch on gearing block)
Gearbox Ratios   6.1 / 3.0 / 2.04 / 1.54
Rear Wheel Ratio   4.5 : 1 (with sidecar 5.14 : 1)
Bevel / Crownwheel   6 / 27 teeth (with sidecar 7:36)
Electrical System
Ignition System   battery ignition
Generator   Noris ZLZ 45/60; 6 V/max. 60 W
Spark Plugs   Bosch W 240 T1
Chassis
Designation   225/2
Frame   closed steel twin-loop frame, welded
Front Wheel Suspension   telescopic fork
Rear Wheel Suspension   pushrod suspension
Wheel Rims   3 x 19 deep-bed
Tyres front   3.25 x 19
Tyres rear   3.25 x 19
Brakes front   drum brake Ø 160 mm
Brakes rear   drum brake Ø 160 mm
Dimensions/Weights
Length x Width x Height   2020 x 790 x 730 mm (Saddle)
Wheel Base   1335 mm
Fuel Tank Capacity   12 l
Unladen Weight, Full Tank   142 kg
PermittedWeight Limit   300 kg (with original sidecar 375 kg )
Clearance   108 mm
Idle/Riding Noise   84/85 phon
Fuel Consumption   approx. 2,9 l/100 km
Oil Consumption   approx. 0,7 l/1000 km
Top Speed   105 kph (with original sidecar 80 kph)