BMW R2 Series 1 (1931)

Technical Specifications
1931 BMW R2 Series 1
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
Spark plugs

Air cooled, Four Stroke single cylinder vertical, OHV
63 x 64 mm (2.48 x 2.51 in)
198cc
OHV
6.7:1
6hp @ 3,500 rpm
-
1 x Sum carburettor 19 mm
3-speed
Cardan
Single plate dry clutch
Battery ignition
Kick starter
Forced Feed Lubrication
2.83 / 1.55 / 1.08
Bosch W 175 or Bosch 200 G 24
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)

Pressed steel duplex frame
1950 mm
850 mm
950 mm
1320 mm
770 mm
130 mm
130 kg
11 litres
Cantilever spring, 9 laminae
Rigid
26x3.5 on 19x3
26x3.5 on 19x3
Drum brake 180 mm / 7.08 in diameter
Drum brake 180 mm / 7.08 in diameter

Image: http://transversealchemy.blogspot.com