Start of Production |
1951 |
Click to View |
End
of Production |
1954 |
Numbers Produced |
18,420 |
Price |
2,750 DM |
Engine |
|
Internal Designation |
252/1 |
Motor Type |
Four-stroke two cylinder flat twin |
Bore x Stroke |
68 x 68 mm
(2.67 x 2.67 in) |
Displacement |
494
cc |
Max
Power |
24 hp
at 5,800 rpm |
Compression Ratio |
6.3 : 1 |
Valves |
OHV |
Carburation System |
2 x
carburettor type Bing 1/22/41 - 1/22/42 or 1/22/61 - 1/22/62 |
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 ('till the end of 1951: 3.6 / 2.28 / 1.7 / 1.3) |
Rear Wheel Ratio |
1 : 3.89 (1 : 4.75 with sidecar) |
Bevel/Crownwheel |
9 / 35
teeth (7 / 32 with sidecar) |
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|
Electrical System |
|
Ignition System |
Magneto
ignition |
Generator |
Noris 6
V L 45/60 L |
Spark Plugs |
Bosch W 240 T1 |
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|
Chassis |
|
Designation |
251/3
(1951), 251/4 (1952/53), 251/4 (1954) |
Frame |
Double
loop steel tubular frame |
Front wheel suspension |
Telescopic fork |
Rear wheel suspension |
Telescopic suspension |
Wheel rims |
3 x 19
deep bed |
Tyres, Front |
3.5 x
19 |
Tyres, Rear |
3.5 x
19 |
Brakes, Front |
Drum
brake 200 mm / 7.87 in diameter (1952:duplex, 1954: full hub) |
Brakes, Rear |
Drum
brake 200 mm / 7.87 in diameter (1954: full hub) |
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|
Dimensions/Weights |
|
Length x Width x Height |
2130 x 790 x 985 mm (83.85 x 31.10 x 38.77 in) |
Wheel
Base |
1400 mm
/ 55.11 in |
Fuel Tank Capacity |
17
litres / 3.73 gal / 4.49 gal US |
Unladen
Weight with Full Tank |
190 Kg
/ 418 lb (with original sidecar, 320Kg / 704 lb) |
Idle/Riding Noise |
84 / 94
phon (from 7/7/1953: 81 / 85 phon) |
Load
Rating |
355 Kg
/ 781 lb (with original sidecar, 600 Kg / 1321 lb) |
Fuel
Consumption |
4.5
litres 100Km approx. / 62 mpg / 52 mpg US |
Oil
Consumption |
0.7
litre per 1,000 Km approx. |
Top
Speed |
135 Kph
/ 83 mph (95 Kph / 59 mph with original sidecar) |
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