1982 BMW R80ST
Engine
Engine type Four-stroke two cylinder horizontally opposed "Boxer" engine, air cooled
Bore x Stroke 84.8 x 70.6 mm (3.33 x 2.77 inches)
Displacement 797.5 cc
Valves 2 valves per cylinder; OHV, using push rod and rocker arm
Compression ratio 8.2:1
Max Power 50 hp (37 KW) @ 6500 rpm
Max Torque 58 Nm / 42 ft lb @ 4000 rpm
Fuel system 2 constant depression carburettors, Bing V 64/32/305 - 64/32/306
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 7 D / Beru14-7D / Champion N10Y
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 2180 mm (85.82 inches)
Overall width 790 mm (31.10 inches)
Overall height 1150 mm (45.27 inches)
Wheelbase 1446 mm (56.92 inches)
Seat height 845 mm (33.3 inches)
Ground clearance 170 mm (6.69 inches)
Dry weight 198 kg
Fuel capacity 19 litres
Colors
Suspension (front) Telescopic fork with hydraulic shock absorber
Suspension (rear) BMW monolever swinging arm
Tyre (front) 100/90 R19 51 H
Tyre (rear) 120/90 R18 65 H
Brake (front) Single 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-cdr.stanford.edu/~petrie/bmw/R80ST/