Technical specifications
|
| Model: |
R 51 |
| Years: |
1938-40 |
|
Engine:
|
Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.
|
|
Capacity:
|
494 cc / 30.1 cu in.
|
|
Bore x Stroke:
|
68 x 68 mm
|
|
Compression Ratio:
|
6.7:1
|
|
Cooling System:
|
Air cooled
|
|
Induction:
|
2 x Amal 5/423 carburetors
|
|
Ignition:
|
Battery ignition
|
|
Starting:
|
Kick
|
|
Clutch:
|
Single plate, dry
|
|
Max Power:
|
18 kW / 24 hp @ 5800 rpm
|
|
Transmission:
|
4 Speed
|
|
Final Drive:
|
Shaft
|
|
Gear Ratio:
|
1st 3.60 / 2nd 2.28 / 3rd 1.70 / 4th 1.30:1
|
|
Frame:
|
Closed double loop steel tubular frame
|
|
Front Suspension:
|
Telescopic fork
|
|
Rear Suspension:
|
Long swing arm with suspension units and oil pressure shock absorbers
|
|
Front Brakes:
|
∅200mm Drum, duplex full hub
|
|
Rear Brakes:
|
∅200mm Drum, simplex full hub
|
|
Front Tyre:
|
3.50 -19"
|
|
Rear Tyre:
|
3.50 -19"
|
|
Wet-Weight:
|
182 kg / 400 lbs
|
|
Fuel Capacity:
|
14 liters / 3.60 US gal
|