BMW R47 (1927)

Technical Specifications
1927 BMW R47
Engine
Engine type
Bore x Stroke
Displacement
Valves
Compression ratio
Max Power
Max Torque
Fuel system
Transmission
Final drive
Clutch
Ignition type
Starting system
Lubrication
Exhaust
Spark plug
Battery
Gear ratios

Air-cooled, 4-stroke, two cylinder flat twin
68.0 x 68.0 mm (2.67 x 2.67 inches)
494 cc
OHV
5.8:1
18 hp @ 4000 rpm

1 carburettor, Type BMW Spezial 2 valve 22 mm
3-speed
Cardan
Dry single plate, with diaphragm spring
Bosch magneto ignition
Kick starter
Wet sump

Bosch W 175
6 volt 12 amp hour
Dimensions
Frame type
Castor
Overall length
Overall width
Overall height
Wheelbase
Seat height
Ground clearance
Dry weight
Fuel capacity
Colors
Suspension (front)
Suspension (rear)
Tyre (front)
Tyre (rear)
Brake (front)
Brake (rear)

Twin loop steel tubular frame

2100 mm (82.67 inches)
800 mm (31.49 inches)
950 mm (37.40 inches)
1410 mm (55.51 inches)
770 mm (30.3 inches)
130 mm (5.11 inches)
130 kg
14 litres

Plate spring, 5 laminae
Rigid
27 x 3.5 low pressure or 26 x 3 high pressure
27 x 3.5 low pressure or 26 x 3 high pressure
Drum brake 150 mm / 5.90 in diameter
External shoe brake at the gearing on Cardan shaft

Image: http://bimmerin.net
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