BMW R80G/S

BMW R80 G/S
Manufacturer	BMW
Also called	R 80 G/S
Production	1879 - 1986
Class	Road
Engine	air-cooled, four-stroke, boxer twin cylinder, 2 valves per cylinder
Bore / Stroke	83.8mm x 83.8mm
Compression ratio	9.2:1
Top Speed	167 km/h / 104 mph
Horsepower	50.02 HP (37.3 KW) @ 6500RPM
Torque	42.04 ft/lbs (57.0 Nm) @ 5000RPM
Spark Plug	Bosch W 7 D / Beru14-7DU / Champion N9YC
Transmission	Gear box: 5-speed, manual Final Drive: shaft Clutch: dry, single plate, diaphragm spring
Suspension	Front: telescopic fork Rear: Monolever
Brakes	Front: single 260mm disc Rear: 200mm drum
Front Tire	3.00 - 21
Rear Tire	4.00 - 18
Wheelbase	57.72 inches (1466 mm)
Length	87.72 inches (2228 mm)
Width	32.28 inches (820 mm)
Seat Height	33.9 inches (861 mm)
Weight	186.0 kg (wet)
Fuel Capacity	1.32 Gallon (5.00 Liters)
Manuals	Service Manual

The BMW R 80 G/S was a air-cooled, four-stroke, boxer twin cylinder, 2 valves per cylinder Road motorcycle produced by BMW between 1879 and 1986. Max torque was 42.04 ft/lbs (57.0 Nm) @ 5000 RPM. Claimed horsepower was 50.02 HP (37.3 KW) @ 6500 RPM.

Engine

A 83.8mm bore x 83.8mm stroke result in a displacement of just 797.0 cubic centimeters.

Drive

The bike has a 5-speed, manual transmission. Power was moderated via the dry, single plate, diaphragm spring.

Chassis

It came with a 3.00 - 21 front tire and a 4.00 - 18 rear tire. Stopping was achieved via single 260mm disc in the front and a 200mm drum in the rear. The front suspension was a telescopic fork while the rear was equipped with a Monolever. The R 80 G/S was fitted with a 1.32 Gallon (5.00 Liters) fuel tank. The wheelbase was 57.72 inches (1466 mm) long.

1879 - 1980 BMW R 80 G/S

The 1980 MY BMW R 80 G/S is an all-road, powerful machine from the House of Munich, suitable for the more adventurous among riders. It comes with features such as laced wheels, a dual seat, a small luggage rack in the rear, pillion grab rails, an analogue instrument cluster, a blacked-out, steel frame, a telescopic front fork and a Monolever rear suspension.

In the engine department it sports an air-cooled, four-stroke, 797cc, boxer twin cylinder powerplant mated to a five-speed manual transmission, and can produce a claimed 50 horsepower and 57 Nm of torque.

1981 BMW R 80 G/S

The 1981 MY BMW R 80 G/S addresses those riders who want to explore as much of their surroundings as possible, whether on or off the road. It has, at its heart, an air-cooled, four-stroke, 797cc, boxer twin cylinder powerplant paired to a five-speed manual transmission that can reach a maximum power output of 50 horsepower and 57 Nm of torque.

Standard fittings include laced wheels, a dual seat, a small luggage rack in the rear, pillion grab rails, an analogue instrument cluster, a blacked-out, steel frame, a telescopic front fork and a Monolever rear suspension, plus a braking system composed of a front disc and a rear drum.

1982 BMW R 80 G/S

The 1982 MY BMW R 80 G/S sports a four-stroke, air-cooled, 797cc, boxer twin cylinder engine mated to a five-speed manual transmission and can produce a claimed 50 horsepower and 57 Nm of torque. Also, it boasts features such as laced wheels, a dual seat, a small luggage rack in the rear, pillion grab rails, an analogue instrument cluster, a blacked-out, steel frame, a telescopic front fork and a Monolever rear suspension, plus a braking system composed of a front disc and a rear drum.

1983 BMW R 80 G/S

The House of Munich has launched yet another embodiment of its R 80 G/S, especially for those riders who want to ride as much as possible, on and off the road alike. It comes with laced wheels, a dual seat, a small luggage rack in the rear, pillion grab rails, an analogue instrument cluster, a blacked-out, steel frame, a telescopic front fork and a Monolever rear suspension, plus a braking system composed of a front disc and a rear drum.

In addition, it boasts a maximum power output of 50 horsepower and 57 Nm of torque from its four-stroke, air-cooled, 797cc, boxer two cylinder powerplant, mated to a five-speed manual transmission.

1984 BMW R 80 G/S

If you are on the market for a powerful, all-purpose two-wheeler, then the 1984 MY BMW R 80 G/S may be the right choice for you. It has, at its heart, a four-stroke, air-cooled, 797cc, boxer twin cylinder powerplant paired to a five-speed manual transmission and can reach a maximum power output of 50 horsepower and 57 Nm of torque.

In addition, it also boasts standard fittings such as laced wheels, a dual seat, a small luggage rack in the rear, pillion grab rails, an analogue instrument cluster, a blacked-out, steel frame, a telescopic front fork and a Monolever rear suspension, plus a braking system composed of a front disc and a rear drum.

1985 BMW R 80 G/S

The 1985 MY BMW R 80 G/S comes with laced wheels, a dual seat, a small luggage rack in the rear, pillion grab rails, an analogue instrument cluster, a blacked-out, steel frame, a telescopic front fork and a Monolever rear suspension, plus a braking system composed of a front disc and a rear drum.

In the engine department, it sports an air-cooled, four-stroke, 797cc, boxer twin cylinder powerhouse mated to a five-speed manual transmission, that produces a claimed 50 horsepower and 57 Nm of torque.

1986 BMW R 80 G/S

The 1986 MY BMW R 80 G/S sports an air-cooled, four-stroke, 797cc, boxer two cylinder powerplant paired to a five-speed manual transmission, and can reach a maximum power output of 50 horsepower and 57 Nm of torque. This machine has been designed by the German engineers to tackle both paved and unpaved roads, and is suitable for the adventurous among Beemer fans.

Standard fittings for this two-wheeler include laced wheels, a dual seat, a small luggage rack in the rear, pillion grab rails, an analogue instrument cluster, a blacked-out, steel frame, a telescopic front fork and a Monolever rear suspension, plus a braking system composed of a front disc and a rear drum.

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Overview

Make Model	BMW R 80G/S
Year	1980
Engine Type	Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.
Displacement	797.5 cc / 48.7 cu in.
Bore X Stroke	84.8 x 70.6 mm
Cooling System	Air cooled
Compression	9.2:1
Induction	2 x Bing constant depression carburetorss
Ignition	Battery ignition
Alternator	Bosch 12 V/280 W
Spark Plug	Bosch W 7 D / Beru14-7DU / Champion N9YC
Starting	Electric & Kick
Max Power	37 kW / 50 hp @ 6500 rpm
Max Torque	56.7 Nm / 5.8 kgf-m / 41 ft lb @ 5000 rpm
Clutch	Dry single plate, with diaphragm spring
Transmission	5 Speed
Final Drive	Shaft
Gear Ratio	1st 4.40 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50:1
Rear Wheel Ratio	1:3.20
Frame	Double loop tubular frame with bolt on rear section
Front Suspension	Telescopic hydraulic forks
Front Wheel Travel	200 mm / 7.8 in
Rear Suspension	Monolever swinging arm
Rear Wheel Travel	170 mm / 6.6 in
Front Brakes	Single ∅260mm disc
Rear Brakes	∅200mm Drum
Front Tire	3.00 - 21
Rear Tire	4.00 - 18
Dimensions	Length 2230 mm / 87.7 in Width 820 mm / 32.3 in Height 1150 mm / 45.2 in
Wheelbase	1465 mm / 67.6 in
Ground Clearance	175 mm / 6.88 in
Seat Height	860 mm / 33.9 in
Wet Weight	186 kg / 409 lbs
Fuel Capacity	19.5 L / 5.1 US gal
Consumption Average	5.2 L/100 km / 19.1 km/l / 45 US mpg
Standing ¼ Mile	13.8 sec
Top Speed	167 km/h / 104 mph
Reviews	Epll.no-ip.com / Beemergarage.com / mc24.no / GS pages
Manual	5united.net / Owner manual

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External Links

• http://epll.no-ip.com/pruebas/1981BMWprop/1981BMWprop.htm
• http://homepage.sunrise.ch/mysunrise/joerg.hau/mot/r80gs.htm
• http://dogpage.future.easyspace.com/
• http://www.5united.net/html/repair.html
• http://www.mc24.no/article.php?articleID=512&categoryID=124
• http://www.beemergarage.com/documents/r80rt2.pdf