1985 BMW R80 Specifications

Name: 1985 BMW R80
Brand: BMW

All-Round • Specs last verified 13 July 2026

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1985 BMW R80 Overview

The 1985 BMW R80 is an all-round motorcycle built around 797 cc of displacement. Under the tank sits a Two cylinder boxer engine running OHV valve actuation, a compression ratio of 8.2:1. The bore and stroke measures 84.8 x 70.6 mm. 1985 BMW R80 delivers. The factory-quoted top speed stands at 181 km/h, making it a capable performer in its class. From a practical standpoint, the 1985 R80 tips the scales at 207 kg and carries a 22-litre fuel tank. That's roughly 17.9 kg heavier than the average all-round motorcycle in our database. Scroll down for the complete 1985 BMW R80 spec sheet covering every technical detail from suspension travel to tyre sizes.

1985 BMW R80 compared with other bikes in the All-Round category

Here is how the 1985 BMW R80 stacks up against other bikes in the All-Round category in our database. Each model counts once, using the model year closest to this one, and the comparison covers up to 497 models.

Top speed of 181 km/h is higher than that of 131 of the other 187 bikes in the All-Round category.
Only 141 of the other 496 bikes in the All-Round category have a larger engine displacement than the 797 cc of the R80.
Narrowing the field to the 108 models within five model years of it, the top speed of 181 km/h is higher than that of 80 of the other 107.

Versus the 1984 model

The figures we track are unchanged from the 1984 model: wet weight, displacement and top speed all match.

1985 R80 - Pros & Cons

Strengths

Strong front braking: The single disc front brake gives excellent stopping power and responds well to aftermarket braided lines.
Large fuel range: The 22-litre tank is generously sized, translating to extended range between stops - ideal for touring or longer commutes.
Low-maintenance final drive: Shaft final drive means no chain to clean, lube or adjust - meaningfully less routine maintenance than a chain-driven equivalent.

Considerations

Age-related wear: As with any used R80, a thorough pre-purchase inspection covering consumables, service history and tyres is always recommended.

Wear Points & Servicing Notes

Brake disc and pad wear

The single disc front brake gives strong, progressive stopping power. Disc thickness and pad depth are worth checking at every tyre change, since worn pads can score the disc surface.

Final drive maintenance

Final drive is by shaft - no chain or belt maintenance at all, though the drive-shaft oil should be changed on the manufacturer's interval.

R80 - Buying & Maintenance Guide

What to check before buying

When inspecting a used 1985 BMW R80 with its 797 cc all-round, start with the basics: check the service book for oil change frequency, inspect the drivetrain for wear, and look for oil seepage around the engine casings and rocker covers. This model runs shaft final drive, so ask for proof the shaft-drive gear oil has been changed on schedule - it's easy to overlook since there's no chain to draw attention to it. Now 41 years old, this all-round is as likely to show age-related wear (perished rubber, seized fasteners, degraded seals) as mileage-related wear. A cold start test is invaluable - a well-maintained R80 should fire up cleanly and settle to a smooth idle within a few seconds.

Oil and filter changes

Regular oil changes are the single most important maintenance task for the R80's 797 cc two cylinder boxer. Stick to the manufacturer's interval - typically every 6,000 km or once a year, whichever comes first. With an 8.2:1 compression ratio, running the octane grade specified in the manual matters more than on a lower-compression engine. Always use the correct viscosity grade as specified in the owner's manual.

1985 BMW R80 - Frequently Asked Questions

What engine does the 1985 BMW R80 have?

The 1985 BMW R80 uses a Two cylinder boxer engine with 797 cc of displacement.

What is the top speed of the 1985 BMW R80?

The 1985 BMW R80 has a factory-quoted top speed of 181 km/h. Real-world speeds vary depending on rider weight, conditions and state of tune.

How much does the 1985 BMW R80 weigh?

The 1985 BMW R80 weighs 207 kg. This is the manufacturer's wet figure.

What is the fuel tank capacity of the 1985 BMW R80?

The 1985 BMW R80 has a 22-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 366-440 km between stops.

What brakes does the 1985 BMW R80 have?

The 1985 BMW R80 uses single disc at the front and Expanding brake at the rear.

What tyre sizes does the 1985 BMW R80 use?

The 1985 BMW R80 runs 90/90-18 front and 120/90-18 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

What is the compression ratio of the 1985 BMW R80?

The 1985 BMW R80 runs a compression ratio of 8.2:1. Always use the minimum octane rating specified in the owner's manual.

BMW R80 Spec Evolution

The BMW R80 was produced across 11 model years (1984-1994). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.

Specification	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994
Wet Weight	207.0 kg / 456.4 lbs	207.0 kg / 456.4 lbs	207.0 kg / 456.4 lbs	207.0 kg / 456.4 lbs	207.0 kg / 456.4 lbs	207.0 kg / 456.4 lbs	210.0 kg / 463.0 lbs	210.0 kg / 463.0 lbs	210.0 kg / 463.0 lbs	-	-
Engine Type	Two cylinder boxer	Two cylinder boxer	Two cylinder boxer	Two cylinder boxer	Two cylinder boxer	Two cylinder boxer	Two cylinder boxer	Two cylinder boxer	Two cylinder boxer	Two cylinder boxer	Two cylinder boxer, four-stroke
Top Speed	181.0 km/h / 112.5 mph	181.0 km/h / 112.5 mph	181.0 km/h / 112.5 mph	181.0 km/h / 112.5 mph	181.0 km/h / 112.5 mph	181.0 km/h / 112.5 mph	177.0 km/h / 110.0 mph	177.0 km/h / 110.0 mph	177.0 km/h / 110.0 mph	-	-
Max Torque	-	-	-	-	-	-	-	-	-	57.86	49.03 Nm (5.0 kgf-m or 36.2 ft.lbs) @ 3750
Power-to-Weight Ratio	-	-	-	-	-	-	-	-	-	0.2632 HP/kg	0.2737 HP/kg

Key Specifications

Engine

Two cylinder boxer

Power

Not recorded

Torque

Not recorded

Top Speed

181.0 km/h / 112.5 mph

Weight

207.0 kg / 456.4 lbs

Fuel Capacity

22.00 litres / 5.81 gallons

Full 1985 BMW R80 Specifications

Fuel Capacity 22.00 litres / 5.81 gallons

Wet Weight 207.0 kg / 456.4 lbs

Top Speed 181.0 km/h / 112.5 mph

Bore x Stroke (in,) 3.3 x 2.8 inches

Bore x Stroke (mm) 84.8 x 70.6 mm

Displacement (cc) 797.00 cc

Displacement (ci) 48.63 cubic inches

Engine Type Two cylinder boxer

Fuel Control OHV

Stroke 4

Compression Ratio 8.2:1

Valve System 2

Final Drive Shaft drive (cardan)

Gearbox 5-speed

Brakes - Front Single disc

Brakes - Rear Expanding brake

Tyres - Front 90/90-18

Tyres - Rear 120/90-18

Specifications are compiled from manufacturer documentation and cross-referenced technical sources, and corrected on an ongoing basis. Spot an error? Let us know.