BMW R 5

BMW R 5 Date 1937

Number sold 1.850

Price 1.375,- RM

Engine

internal designation 261
engine type four-stroke two-cylinder flat-twin
Bore/stroke 70 x 78 mm
Cubic capacity 600 cm3
Max power 18 PS at 4500 U /min
Compression ratio 6 : 1
Valves per cylinder sv
Carburation system 2 carburettor, Typ Amal M 75 / 426 / S
Engine lubrication forced-feed lubrication
oil pump gear pump

 
Power transmission

Clutch single discs, dry
Number of gears 4
shifting foot shifting (+ auxiliary manual lever on the gear block)
Gear ratios 3,6 / 2,28 / 1,7 / 1,3
Rear wheel ratio 1 : 3,89 (sidecar 1 : 4,62)
Bevel/crown wheel 9 / 35 teeth (sidecar 8 / 37)

 
Electrical system

Alternator Bosch RD 45/6 2800 RS 15
Ignition battery ignition
Spark plugs Bosch W 175 T 1

 
Suspension

designation 250
Type of frame twin-loop steel tubular frame
Front suspension telescopic fork
Rear suspension rigid
wheel rims 3 x 19
Tyres front 3,50 x 19
Tyres rear 3,50 x 19
Brakes front drum braken, 200 mm
Brakes rear drum brakes, 200 mm

 
Dimensions and weights

Length x width x height 2130 x 800 x 950 mm
Wheel base 1400 mm
Tank capacity 15 l
Unladen weight, full tank 175 kg
load rating 210 kg
Fuel consumption ca. 3,5 l / 100 km
oil consumption ca. 1 l / 1000 km
Top speed 125 km/h