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1950 BMW R 51/2 technical specifications

BMW R 51/2 technical specifications

Technical specifications

Model: R 51/2
Years: 1950 - 51
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: 6.4:1
Cooling System: Air cooled
Induction: 2 x Bing Spezial 1/22/29 and 1/22/30 carburetors
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
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: 185 kg / 407 lbs
Fuel Capacity : 14 liters / 3.60 US gal

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