1980 BMW R100
Engine
Engine type Four-stroke two cylinder horizontally opposed "Boxer" engine, air cooled
Bore x Stroke 94.0 x 70.6 mm (3.70 x 2.78 inches)
Displacement 980 cc
Valves 2 valves per cylinder; OHV, using push rod and rocker arm
Compression ratio 8.2:1
Max Power 67 hp (49 KW) @ 7000 rpm
Max Torque 72 Nm / 53.09 ft lb @ 5500 rpm
Fuel system 2 constant depression carburettors, Bing V 94/40/111 - 94/40/112
Transmission 5-speed; Dog type gearbox (ratchet foot lever)
Final drive Cardan
Clutch Dry single plate, with lever action diaphragm spring
Ignition type Contact free electronic ignition (Bosch)
Starting system Electric starter
Lubrication Wet sump
Exhaust
Spark plug Bosch W 5 D / Beru 14-5D / Champion N6Y
Generator
Gear ratios 4.4 / 2.86 / 2.07 / 1.67 / 1.50 : 1
Dimensions
Frame type Double loop tubular frame with bolt on rear section
Castor
Overall length 2210 mm (87.00 inches)
Overall width 746 mm (29.37 inches)
Overall height 1210 mm (47.63 inches)
Wheelbase 1465 mm (57.67 inches)
Seat height 820 mm (32.30 inches)
Ground clearance 165 mm (6.49 inches)
Dry weight 218 kg
Fuel capacity 24 litres
Colors
Suspension (front) Telescopic fork with hydraulic shock absorber
Suspension (rear) Long swinging arm with adjustable strut
Tyre (front) 3.25 H 19
Tyre (rear) 4.00 H 18
Brake (front) Dual disc brake 260 mm / 10.23 in diameter. Brembo 2 piston caliper
Brake (rear) Simplex drum brake 200 mm / 7.87 in diameter
Image: http://www.bmbikes.co.uk/photos/specphotos/r100.jpg