BMW R52 (1928)

Technical Specifications
1928 BMW R52
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, Four-stroke two cylinder flat twin
63.0 x 78.0 mm (2.48 x 3.07 inches)
486 cc
SV
5.0:1
12 hp @ 3400 rpm

1 carburettor, Type BMW Spezial 2 valve 22 mm
3-speed (foot shifting)
Cardan
Single plate, dry - two plates from engine No. 50761
Bosch high voltage magneto ignition
Kick starter
Forced feed lubrication

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)
960 mm (37.40 inches)
1400mm (55.11 inches)
850 mm (33.50 inches)
165 mm (6.49 inches)
152 kg
12.5 litres

Plate spring, 6 laminae
Rigid
26 x 3.5 low pressure or 26 x 3.5 high pressure
26 x 3.5 low pressure or 26 x 3.5 high pressure
Drum brake 200 mm / 7.87 in diameter
External shoe brake at the gearing on Cardan shaft

Image: http://www.bmbikes.co.uk
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