BMW K 100 - 1989 Specifications and Reviews

The 1989 BMW K 100 is a sophisticated naked bike powered by a smooth 987cc inline-four engine delivering 90 horsepower and a top speed of 218 km/h. Best known for its innovative shaft drive and liquid-cooled DOHC engine, it suits riders seeking a refined, technology-forward alternative to traditional motorcycles. Its balanced performance and distinctive engineering made it a landmark bike for touring and everyday riding.

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General information

CategoryNaked bike
Year1989
ModelBMW K 100

Engine and Transmission Specifications

Transmission type,final driveShaft drive (cardan)
Gearbox5-speed
Cooling systemLiquid
Fuel controlDOHC
Valves per cylinder2
Bore x stroke67.0 x 70.0 mm (2.6 x 2.8 inches)
Compression10.2:1
Top speed218.0 km/h (135.5 mph)
Power90.00
Engine typeIn-line four, four-stroke
Capacity:987.00 ccm (60.23 cubic inches)
 
 

Brakes, suspension, Frame and wheels

Rear brakesSingle disc
Front brakesDual disc
Rear tyre dimensions130/90-17
Front tyre dimensions100/90-18

Physical measures and capacities

Fuel capacity21.00 litres (5.55 gallons)
Weight incl. oil, gas, etc243.0 kg (535.7 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

90 hp
Peak Power
4.8s
0-60 mph
135.5 mph
Top Speed

Best For

Track22%
City45%
Cornering50%
Daily Riding66%
Touring78%
Passenger74%

Rider Profile

Best ForSuited to intermediate and experienced riders comfortable managing a tall, heavy 243kg machine; not ideal as a first bike.
PurposeA do-it-all standard built for relaxed distance riding, commuting and two-up touring with its smooth shaft drive and big 21L tank.
Rider FitUpright naked ergonomics with a broad seat; hefty wet weight and low-slung longitudinal 'flying brick' four give planted, stable feel.
CharacterThe iconic BMW 'flying brick' - smooth, torquey, unburstable and refined, prizing effortless long-haul competence over sporty aggression.
Not Ideal ForNot for off-road use, tight-carving sportbike thrills, or riders wanting a light, flickable city machine.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Reviews

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