BMW R 51/3 (1951-55) technical specifications

BMW R 51/3 is produced in 1951-55. Engine is Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder., displacement 494 cc / 30.1 cu in. , produces power 18 kW / 24 hp @ 5800 rpm. BMW R 51/3 wet weight is 190 kg / 418 lbs. BMW R 51/3 has 4 photos.

Technical specifications

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Model:	R 51/3
Years:	1951-55
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:	6.3:1
Cooling System:	Air cooled
Induction:	2x Bing 1/22/41 - 1/22/42 or 1/22/61 - 1/22/62
Ignition:	Bosch coil with manual advance by the handlebar lever
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 with hydraulic damping, plunger type
Rear Suspension:	Spring with coil compression springs and rubber deflection stops
Front Brakes:	∅200mm Drum, duplex full hub
Rear Brakes:	∅200mm Drum, simplex full hub
Front Tyre:	3.50 -19" Metzeler
Rear Tyre:	3.50 -19" Metzeler
Wet-Weight:	190 kg / 418 lbs
Fuel Capacity:	17 liters / 4.4 US gal