BMW R 50 / 5

BMW R 50/5 Date 1969 - 1973

Number sold 7.865

Price 3.696,- DM

Engine

Type four-stroke, two-cylinder, horizontally-opposed "Boxer" engine, air-cooled
Bore/stroke 67 x 70,6 mm
Cubic capacity 498 cm3
Max power 32 PS (23,6 kW) at 6400 rpm
Compression ratio 8,6 : 1
Valves per cylinder 2
Valve control ohv, using push rod and rocker arm
Carburation system 2 slide carburettors, Bing 1/26/113 -1/26/114
Engine lubrication wet sump

 
Power transmission

Clutch dry single plate, with diaphragm spring
Number of gears 4
shifting dog-type gearbox (ratchet foot lever)
Gear ratios 3,896 / 2,578 / 1,875 / 1,50 : 1
Rear wheel ratio 1 : 3,56
Bevel/crown wheel 9 / 32 teeth

 
Electrical system

Alternator Bosch LJ/CGE 60/6/1700 R
Ignition battery ignition
Starter Bosch 0,5 PS (optional at additional charge)
Spark plugs Bosch W 230 T 30 / Beru 230/14/3 A / Champion N 7 Y

 
Suspension

Type of frame double-loop tubular frame with bolt-on rear section
Front suspension telescopic fork with hydraulic shock absorber
Rear suspension long swinging arm with strut
Spring travel 208 / 125 mm
Rims front 1,85 B 19
Rims rear 1,85 B 18 or 2,15 B 18
Tyres front 3,25 S 19
Tyres rear 4,00 S 18
Brakes front Duplex-drum brake 200 mm
Brakes rear Simplex drum brake 200 mm

 
Dimensions and weights

Length x width x height 2100 x 850 x 1040 mm (from 1973: 2150 x 850 x 1040 mm)
Wheel base 1385 mm (from 1973: 1435 mm)
Ground clearance 165 mm ( at 75 kg load)
Tank capacity 24 l (from 1971: 17 l)
Unladen weight, full tank 205 kg (from 1971: 200 kg)
Max permissible weight 398 kg
Fuel consumption 4,6 l / 100 km (at constant 90 km/h)
Acceleration 0 - 100 km/h 10,2 s
Top speed 157 km/h