BMW R 51 SPECIFICATIONS, PRICE & IMAGES

Bike Features

Make Model:
BMW R 51

Year:
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