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BMW R80G/S Specifications

 

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Start of Production

1980

BMW R80G/S

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End of Production

1987

Numbers Produced

21,864

Price

8,920 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

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

200 / 170 mm (7.87 x 6.69 in)

Wheel Rims, Front

1.85 B 21

Wheel Rims, Rear

2.15 B 18 (early machines) 2.50 B 18 (later machines)

Tyres, Front

3.00 x 21 48 R

Tyres, Rear

4.00 x 18 64 R

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

2230 x 820 x 1150 mm (87.79 x 32.28 x 45.27 in)

Wheel Base

1465 mm / 57.67 in

Fuel Tank Capacity

19.5  litres / 4.28 gal / 5.15 gal US (Paris - Dakar: 32 litres / 7.03 gal / 8.45 gal US)

Unladen Weight with Full Tank

186 Kg / 409 lb (Paris - Dakar: 205 Kg / 451 lb)

Max. Permissible Weight

398 Kg / 876 lb

Ground Clearance

175 mm / 6.88 in

Seat Height (Unladen)

860 mm (33.9 inches)

Fuel Consumption

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

Top Speed

168 Kph / 104 mph

Acceleration 0 - 100 Kph / 62 mph

5.6 seconds

BMW R80G/S Power Graphs

 

 

 

 

 

 

Member of BM Riders Club, The BMW Club, BMF, BMWMOA, The Airheads and The Poverty Riders

Check out my other sites at: www.bmridersclub.com & www.boxerman.co.uk