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 |
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