BMW R 50 / 2

BMW R 50/2 Date 1960 - 1969

Number sold 19.036

Price 3.130,- DM

Engine

internal designation 252 / 2
engine type four-stroke two-cylinder flat-twin
Bore/stroke 68 x 68 mm
Cubic capacity 494 cm3
Max power 26 PS at 5800 U /min
Compression ratio 7,5 : 1
Valves per cylinder ohv
Carburation system 2 carburettor Typ Bing 1/24/45-46 or 1/24/131-132 or 1/24/149-150
Engine lubrication forced-feed lubrication
oil pump gear pump

 
Power transmission

Clutch single disc saucer spring, dry
Number of gears 4
shifting foot shifting
Gear ratios 4,17 / 2,73 / 1,94 / 1,54 (with sidecar: 5,33 / 3,02 / 2,04 / 1,54)
Rear wheel ratio 1 : 3,18 (with sidecar 1 : 4,25 or 1 : 4,33)
Bevel/crown wheel 11 / 35 teeth (with sidecar 8 / 34 or 6 : 26)

 
Electrical system

Alternator Bosch LJ/CGE 60/6/1700 R
Ignition magneto ignition
Spark plugs Bosch W 240 T 1 or Beru 240 / 14

 
Suspension

designation 245/1
Type of frame twin-loop steel tubular frame
Front suspension long swinging arm with strut und oil-pressure shock absorbers
Rear suspension long swinging arm with strut und oil-pressure shock absorbers
wheel rims deep-bed 3 x 18 ( at sidecar, rear 2,75C x 18)
Tyres front 3,50 x 18
Tyres rear 3,50 x 18 ( at sidecarbetrieb hinten 4 x 18)
Brakes front drum brake, 200 mm Duplex full hub
Brakes rear drum brake, 200 mm Simplex full hub

 
Dimensions and weights

Length x width x height 2125 x 660 x 980 mm
Wheel base 1415 mm (with sidecar 1450 mm)
Tank capacity 17 l
Unladen weight, full tank 195 kg (with orig. BMW sidecar 320 kg)
load rating 360 kg (with orig. BMW sidecar 600 kg)
idle/riding noise 82 / 76 phon, (from Juni 1967: 72 dB(A), 84 dB(A))
Fuel consumption ca. 5,1 l / 100 km
oil consumption ca. 0,5 - 1 l / 1000 km
Top speed 140 km/h (with sidecar 100 km/h)