Model: R 68
Production  
Engine  
Power transmission  
Electrical System  
Chassis  
Dimensions/Weights  
     
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Production
Begin of the Production   1952
End of the Production   1954
Numbers Produced   1452
Price   3.950,- DM
Engine
Internal Designation   268/1
Motor Type   four-stroke two-cylinder flat-twin
Bore x Stroke   72 x 73 mm
Displacement   594 ccm
Max Power   35 hp at 7000 rpm
Compression Ratio   8.0 : 1
Valves   ohv
Carburetion System   2 x carburettor type Bing 1/26/9 - 1/26/10
Engine Lubricating System   forced-feed lubrication
Oil Pump   gear pump
Power Transmission
Clutch   single-plate, dry
Number of Gears   4
Shifting   foot shifting (auxiliary manual lever on the gear block)
Gearbox Ratios   4.0 / 2.28 / 1.7 / 1.3
Rear Wheel Ratio   1 : 3.89 (with sidecar 1 : 4.75)
Bevel / Crownwheel   9 / 35 teeth (with sidecar 7 / 32)
Electrical System
Ignition System   magneto ignition
Generator   Noris 6 V L 45/60 L
Spark Plugs   Bosch W 240 T1
Chassis
Designation   251/4
Frame   double loop steel tubular frame
Front Wheel Suspension   telescopic fork
Rear Wheel Suspension   telescopic suspension
Wheel Rims   deep-bed 3 x 19
Tyres front   3.5 x 19
Tyres rear   3.5 x 19
Brakes front   drum brake Ø 200 mm duplex, from 1954: full hub
Brakes rear   drum brake Ø 200 mm simplex, from 1954: full hub
Dimensions/Weights
Length x Width x Height   2130 x 725 x 985 mm
Wheel Base   1400 mm
Fuel Tank Capacity   17 l
Unladen Weight, Full Tank   190 kg (with original sidecar 320 kg)
Idle/Riding Noise   85/96 phon, from 7/7/1953: 80/87 phon
Load Rating   355 kg (with original sidecar 600 kg )
Fuel Consumption   approx. 4,6 l/100 km
Oil Consumption   approx. 0,7 l/1000 km
Top Speed   160 kph (with original sidecar 116 kph)