1989 BMW R 65GS Specifications

Name: 1989 BMW R 65GS
Brand: BMW

Enduro / Off-Road • Specs last verified 13 July 2026

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1989 BMW R 65GS Overview

For 1989, BMW offers the R 65GS as an enduro / off-road motorcycle with 649 cc on tap. The 1989 BMW R 65GS is built around a Two cylinder boxer engine running OHV valve actuation, a compression ratio of 8.4:1. Internally, bore and stroke are 82 x 61.5 mm. Out on the road, the R 65GS delivers. Flat out, it's quoted at 146 km/h. In everyday use, the 1989 R 65GS tips the scales at 198 kg and carries a 19.50-litre fuel tank. That's roughly 28.8 kg heavier than the average enduro / off-road motorcycle in our database. Every technical detail, from suspension travel to tyre sizes, is covered in the full 1989 BMW R 65GS spec sheet below.

1989 BMW R 65GS compared with other bikes in the Enduro / Off-Road category

Measured against other bikes in the Enduro / Off-Road category in our database (up to 1434 models, one entry per model), the 1989 BMW R 65GS comes out as follows.

With 649 cc, the R 65GS has the joint 385th largest engine displacement of 1434 bikes in the Enduro / Off-Road category, 33% above the category average of 486 cc.
Wet weight of 198 kg is heavier than that of 491 of the other 773 bikes in the Enduro / Off-Road category.
Narrowing the field to the 276 models within five model years of it, the engine displacement of 649 cc is larger than that of 241 of the other 275.

Versus the 1988 model

The figures we track are unchanged from the 1988 model: wet weight, displacement and top speed all match.

1989 R 65GS - Pros & Cons

Strengths

Strong front braking: The single disc front brake bites hard and stays consistent - a solid foundation whether it's stock or upgraded with braided lines.
Large fuel range: With a 19.50-litre tank, this isn't a bike you'll be stopping for fuel every hour - a real asset on longer trips.
Low-maintenance final drive: Shaft final drive is about as close to maintenance-free as motorcycle drivetrains get.

Considerations

Age-related wear: No particular mechanical concern flags for the R 65GS - condition on any used example comes down to how well it's been looked after.

Wear Points & Servicing Notes

Brake disc and pad wear

Single disc up front provides the primary stopping power; inspect disc thickness and pad wear at each tyre change to catch scoring before it becomes a rotor replacement.

Final drive maintenance

Shaft final drive on the R 65GS removes chain and belt maintenance entirely - the trade-off is a little extra unsprung weight and periodic gear-oil changes.

R 65GS - Buying & Maintenance Guide

What to check before buying

A pre-purchase check on the 1989 BMW R 65GS with its 649 cc enduro / off-road should cover the same ground every time: service history, drivetrain condition, and any oil seepage around the casings. 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 37 years old, this enduro / off-road is as likely to show age-related wear (perished rubber, seized fasteners, degraded seals) as mileage-related wear. Start it from cold if you can - a well-kept R 65GS settles to a smooth idle within seconds.

Oil and filter changes

Oil changes are the cheapest insurance you can buy for the R 65GS's 649 cc two cylinder boxer - keep to the manufacturer's interval rather than stretching it. With an 8.4:1 compression ratio, running the octane grade specified in the manual matters more than on a lower-compression engine. Use the viscosity grade the manual specifies, not whatever's on sale.

1989 BMW R 65GS - Frequently Asked Questions

What engine does the 1989 BMW R 65GS have?

The 1989 BMW R 65GS uses a Two cylinder boxer engine with 649 cc of displacement.

What is the top speed of the 1989 BMW R 65GS?

The 1989 BMW R 65GS has a factory-quoted top speed of 146 km/h. Real-world speeds vary depending on rider weight, conditions and state of tune.

How much does the 1989 BMW R 65GS weigh?

The 1989 BMW R 65GS weighs 198 kg. This is the manufacturer's wet figure.

What is the fuel tank capacity of the 1989 BMW R 65GS?

The 1989 BMW R 65GS has a 19.50-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 325-390 km between stops.

What brakes does the 1989 BMW R 65GS have?

The 1989 BMW R 65GS uses single disc at the front and Expanding brake at the rear.

What tyre sizes does the 1989 BMW R 65GS use?

The 1989 BMW R 65GS runs 3.00-21 front and 4.00-18 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

What is the compression ratio of the 1989 BMW R 65GS?

The 1989 BMW R 65GS runs a compression ratio of 8.4:1. Always use the minimum octane rating specified in the owner's manual.

BMW R 65GS Spec Evolution

The BMW R 65GS was produced across 4 model years (1987-1990). 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	1987	1988	1989	1990
Wet Weight	198 kg / 437 lbs	198.0 kg / 436.5 lbs	198.0 kg / 436.5 lbs	198.0 kg / 436.5 lbs
Fuel Capacity	19.5 L / 5.2 US gal	19.50 litres / 5.15 gallons	19.50 litres / 5.15 gallons	19.50 litres / 5.15 gallons
Brakes - Front	Single ∅260mm disc	Single disc	Single disc	Single disc
Brakes - Rear	Simple ∅200mm drum	Expanding brake	Expanding brake	Expanding brake
Final Drive	Shaft	Shaft drive (cardan)	Shaft drive (cardan)	Shaft drive (cardan)
Tyres - Front	3.00-21"	3.00-21	3.00-21	3.00-21
Tyres - Rear	4.00-18"	4.00-18	4.00-18	4.00-18

Key Specifications

Engine

Two cylinder boxer

Power

Not recorded

Torque

Not recorded

Top Speed

146.0 km/h / 90.7 mph

Weight

198.0 kg / 436.5 lbs

Fuel Capacity

19.50 litres / 5.15 gallons

Full 1989 BMW R 65GS Specifications

Fuel Capacity 19.50 litres / 5.15 gallons

Wet Weight 198.0 kg / 436.5 lbs

Top Speed 146.0 km/h / 90.7 mph

Bore x Stroke (in,) 3.2 x 2.4 inches

Bore x Stroke (mm) 82.0 x 61.5 mm

Displacement (cc) 649.00 cc

Displacement (ci) 39.60 cubic inches

Engine Type Two cylinder boxer

Fuel Control OHV

Stroke 4

Compression Ratio 8.4:1

Valve System 2

Final Drive Shaft drive (cardan)

Gearbox 5-speed

Brakes - Front Single disc

Brakes - Rear Expanding brake

Tyres - Front 3.00-21

Tyres - Rear 4.00-18

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

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