BMW R63 (1928)

Technical Specifications
Engine
Engine type
Bore x Stroke
Displacement
Valves
Compression ratio
Max Power
Max Torque
Carburation system
Transmission
Final drive
Clutch
Ignition type
Starting system
Lubrication
Gear ratios

4-stroke, 2 cylinder flat twin
83 x 68 mm
735cc
OHV
6.2:1
24 hp @ 4,000 rpm
-
1 carburettor, type BMW Spezial 2 valve 24 mm
3-speed
-
Single plate, dry-two plates from engine No. 75845
Bosch high voltage magneto ignition
-
Forced feed lubrication
2.83 / 1.55 / 1.08
Dimensions
Frame type
Overall length
Overall width
Overall height
Wheelbase
Seat height
Ground clearance
Weight
Fuel capacity
Suspension (front)
Suspension (rear)
Tyre (front)
Tyre (rear)
Brake (front)
Brake (rear)

Twin loop steel tubular frame
2100 mm
800 mm
950 mm
1400 mm
770 mm
130 mm
152 kg
12.5 litres
Plate spring, 6 laminae
Rigid
26x3.5 on 19x3
26x3.5 on 19x3
Drum brake 200 mm
External shoe brake at the gearing on Cardan shaft

Image: http://www.flickr.com
Source:
http://www.bmbikes.co.uk
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