R12 Twin Carb
Start of Production | 1935 |
Click to View Available Literature |
End of Production | 1942 | |
Number Produced: | 36,000 (single and twin carb versions) | |
Price: | 1,630 RM | |
Engine |
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Internal Designation | M 56 S 6 or 212 | |
Motor Type | Four Stroke two cylinder flat twin | |
Bore x Stroke | 78 x 78 mm (3.07 x 3.07 in) | |
Displacement | 745 cc | |
Maximum Power | 20hp at 4,000 rpm | |
Compression Ratio | 5.2 : 1 | |
Valves | SV | |
Carburation System | 2 x Amal 6/406/407 | |
Engine Lubricating System | Forced Feed Lubrication | |
Oil Pump | Gear Pump | |
Power Transmission |
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Clutch | Double plate dry clutch | |
Number of Gears | 4 | |
Gear Shift | Manual | |
Gearbox Ratios | 3.18 / 2.06 / 1.42 / 1.09 | |
Rear Wheel Ratio | 1 : 4.07 (1 : 4.75 with sidecar) | |
Bevel / Crownwheel | 14 / 57 teeth (12 / 57 with sidecar) | |
Electrical System |
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Ignition System | Magneto or battery ignition | |
Generator | Bosch D 245 RS 108 | |
Spark Plugs | Bosch M 175 T1 or Bosch W 175 T1 | |
Chassis |
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Designation | F66 | |
Frame | Pressed steel twin loop frame | |
Front Suspension | Telescopic fork | |
Rear Suspension | Rigid | |
Wheel Rims | 3 x 19 | |
Front Tyre | 3.5 x 19 | |
Rear Tyre | 3.5 x 19 | |
Front Brakes | Drum brake 200 mm / 7.87 in diameter | |
Rear Brake | Drum brake 200 mm / 7.87 in diameter | |
Dimensions / Weights |
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Length x Width x Height | 2100 x 900 x 940 mm (82.67 x 35.43 x 37.00 in) | |
Wheel Base | 1380 mm / 54.33 in | |
Fuel Tank Capacity | 14 litres / 3.07 gal / 3.69 gal US | |
Unladen Weight with full tank | 185 kg approx / 407 lb | |
Permitted Weight Limit | 300 kg / 660 lb | |
Fuel Consumption | 4 - 4.5 litres per 100 kilometres approx / 70 - 62 mpg / 58 - 52 mpg US | |
Oil Consumption | 1 - 2 litres per 1,000 kilometres | |
Top Speed | 120 kph / 74 mph | |
Information kindly supplied by P.Hawksley