BMW R25 (1950)

Technical Specifications
1950 BMW R25
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, single cylinder vertical
68.0 x 68.0 mm (2.67 x 2.67 inches)
247 cc
OHV
6.75:1
12 HP @ 5600 rpm

1 x Bing type 1/22/28
4-speed, foot switching (+ auxiliary manual switch on gearing block)
Shaft
Single plate dry clutch
Battery ignition
Kick starter
Forced Feed Lubrication

Bosch W 240 T1 or Bosch W 225 T1
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)

Closed steel twin loop frame, bolted

2073 mm (81.61 inches)
750 mm (29.52 inches)
710 mm (27.95 inches)
1330 mm (52.36 inches)
828 mm (32.6 inches)
185 mm (7.3 inches)
140 kg
12 litres

Telescopic fork
Rigid
3.25 R19
3.25 R19
Drum brake 160 mm / 6.29 inches diameter
Drum brake 160 mm / 6.29 inches diameter

Image: http://www.bmw-mono-club.nl/BMW_R25_test_1950.htm
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