R4 series 3
Start of Production | 1934 |
Click to View Available Literature |
End of Production | 1934 | |
Number Produced: | 3,671 | |
Price: | 1,150 RM | |
Engine | ||
Internal Designation | M 69 S 3 | |
Motor Type | Four Stroke single cylinder vertical | |
Bore x Stroke | 84 x 78 mm (3.30 x 3.07 in) | |
Displacement | 398 cc | |
Maximum Power | 14 hp at 4,000 rpm | |
Compression Ratio | 5.7 : 1 | |
Valves | OHV | |
Carburation System | 1 x carburettor type SUM CK 3/500 Fr | |
Engine Lubricating System | Forced Feed Lubrication | |
Oil Pump | Gear Pump | |
Power Transmission | ||
Clutch | Single plate dry clutch | |
Number of Gears | 4 | |
Gear Shift | Manual with frame shift gate | |
Gearbox Ratios | 3.6 / 2.18 / 1.35 /1.1 | |
Rear Wheel Ratio | 1 : 5.11 (1 : 5.63 with sidecar) | |
Bevel / Crownwheel | 9 / 46 teeth (8 / 45 with sidecar) | |
Electrical System | ||
Ignition System | Battery ignition | |
Generator | Bosch 6V/45W | |
Spark Plugs | Bosch DM 175/1 | |
Chassis | ||
Designation | F 69 S 3 | |
Frame | Pressed steel duplex frame | |
Front Suspension | Plate spring, 9 laminae with friction shock absorber | |
Rear Suspension | Rigid | |
Wheel Rims | 26 x 3.5 | |
Front Tyre | 26 x 3.5 SS | |
Rear Tyre | 26 x 3.5 SS | |
Front Brakes | Drum brake 180 mm / 7.08 in diameter | |
Rear Brake | Drum brake 180 mm / 7.08 in diameter | |
Dimensions / Weights | ||
Length x Width x Height | 1980 x 850 x 950 mm (77.95 x 33.46 x 37.40 in) | |
Wheel Base | 1300 mm / 5.11 in | |
Fuel Tank Capacity | 12 litres / 2.63 gal / 3.17 gal US | |
Unladen Weight with full tank | 137 kg / 301 lb | |
Permitted Weight Limit | 200 kg / 440 lb | |
Fuel Consumption | 3.5 litres per 100 kilometres approx / 80 mpg / 67 mpg US | |
Oil Consumption | 1 - 2 litres per 1,000 kilometres | |
Top Speed | 100 kph / 62 mph | |
Information kindly supplied by P.Hawksley | ||
Information kindly supplied by P.Hawksley