BMW R45 (1978)

Technical Specifications
1978 BMW R45
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 horizontally opposed "Boxer" engine, OHV
70.0 x 61.5 mm (2.75 x 2.42 inches)
473.4 cc
2 valves per cylinder
9.2:1
35 hp (26 Kw) at 7250 rpm or 27 hp (20 Kw) at 6500 rpm
37.5 Nm at 5500 rpm or 31.3 Nm at 5000 rpm
2 constant depression carburettors
5-speed, dog type gearbox (ratchet foot lever)
Cardan
Dry single plate, with diaphragm spring
Battery ignition. From 1981model: Contact free electronic ignition
Kick starter
Wet sump

Bosch W5D/Beru 14-5D/Champion N6Y or Bosch W7D/Beru 14-7D/Champion N10Y
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)

Double loop tubular frame with bolt on rear section

2110 mm (83.07 inches) 1080 mm (42.51 in)
688 mm (27.08 inches)
1080 mm (42.51 inches)
1390 mm (54.72 inches)
770 mm (30.3 inches)
130 mm (5.11 inches)
205 kg
22 litres

Telescopic fork with hydraulic shock absorber
Long swinging arm with adjustable strut
3.25 R18
4.00 R18
Single disc brake 260 mm with 2 piston caliper
Simplex drum brake 200 mm / 7.87 in diameter

Image: http://www.motoshistoricas.com
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