R80ST

Start of Production

1982

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End of Production

1984

Numbers Produced

5,963

Price

9,490 DM

Engine

Motor 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 in)

Displacement

797.5 cc

Max Power

50 hp (37 KW) at 6,500 rpm

Max Torque

56.7 Nm / 41 ft lb at 5,000 rpm

Compression Ratio

8.2 : 1

Valves Per Cylinder

2

Valve Control

OHV, using push rod and rocker arm

Carburation System

2 constant depression carburettors, Bing V 64/32/305  -  64/32/306

Engine Lubricating System

Wet sump

Power Transmission

Clutch

Dry single plate, with lever action diaphragm spring

Number of Gears

5

Gear Selection

Dog type gearbox (ratchet foot lever)

Gearbox Ratios

4.4 / 2.86 / 2.07 / 1.67 / 1.50 : 1

Rear Wheel Ratio

1 : 3.36

Bevel/Crownwheel

11 / 37 teeth

Electrical System

Ignition System

Contact free electronic ignition (Bosch)

Alternator

Bosch 280 W

Starter

Bosch 0.7 Kw

Spark Plugs

Bosch W 7 D / Beru14-7D / Champion N10Y

Chassis

Type of Frame

Double loop tubular frame with bolt on rear section

Front wheel suspension

Telescopic fork with hydraulic shock absorber

Rear wheel suspension

BMW Monolever swinging arm

Spring Travel Front/Rear

175 / 153 mm (6.88 x 6.02 in)

Wheel Rims, Front

1.85 B 19

Wheel Rims, Rear

2.50 B 18

Tyres, Front

100/90 H 19

Tyres, Rear

120/90 H 18

Brakes, Front

Single disc brake 260 mm / 10.23 in diameter. Brembo 2 piston caliper

Brakes, Rear

Simplex drum brake 200 mm / 7.87 in diameter

Dimensions / Weights

Length x Width x Height

2180 x 790 x 1150 mm (85.82 x 31.10 x 45.27 in)

Wheel Base

1446 mm / 56.92 in

Fuel Tank Capacity

19 litres / 4.17 gal / 5.01 gal US

Unladen Weight with Full Tank

198 Kg / 436 lb

Max. Permissible Weight

398 Kg / 876 lb

Ground Clearance

170 mm / 6.69 in

Seat Height (Unladen)

845 mm (33.3 inches)

Fuel Consumption

5.0 litres 100 Km (at constant 90 Kph) / 47 mpg US or 56 mpg / 47 mpg US

Top Speed

174 Kph / 108 mph

Acceleration 0 - 100 Kph / 62 mph

5.6 seconds