Naked Motorcycles
1981Kawasaki Z 1100 ST
19 fields on record
The 1981 Kawasaki Z 1100 ST is a sport-touring middleweight combining a potent 1089cc four-cylinder engine with practical touring capability. Known for its responsive DOHC powerplant delivering 97 horsepower and shaft-drive reliability, it suits riders seeking a balance between performance and comfort. Its manageable weight and five-speed transmission make it ideal for both spirited riding and long-distance travel.
- Capacity
- 1089.0 ccm
- Engine
- In-line four
- Gearbox
- 5-speed
- Wet weight
- 271.0 kg
- Seat height
- Not on record
Know it? Add it → - Power
- 97.0 HP (71.3 kW) @ 8000 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built as a shaft-driven sport-tourer of its era, it favors sustained highway cruising and long straight-road pulls over tight technical work.
- Built for
- A torque-rich, air-cooled inline-four with shaft drive gives a smooth, low-maintenance, unhurried muscular character rather than a razor-sharp one.
- Not ideal for
- Not for riders seeking nimble flickability, off-road capability, or a lightweight commuter for tight urban lane-splitting.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 1089.0 ccm
- Power
- 97.0 HP (71.3 kW) @ 8000 RPM
- Engine type
- In-line four
- Power/weight ratio
- 0.3579 HP/kg (wet)
- Bore x stroke
- 72.5 x 66.0 mm
- Compression
- 8.9:1
- Cooling system
- Air
- Valves per cylinder
- 2
- Torque
- Not on record - add it
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Shaft
Performance
- Top speed
- 212.0 km/h (131.7 mph)
Dimensions & weight
Brakes & wheels
- Front brakes
- Dual disc
- Rear brakes
- Single disc
- Front tyre
- 3.50-19
- Rear tyre
- 130/90-16
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 1981 | 1982 | 1983 |
|---|---|---|---|
| Capacity | 1089 cc | 1089 cc | 1089 cc |
| Fuel capacity | 18 L | 21 L | 21 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Kawasaki Z 1100 ST?
The 1981 Kawasaki Z 1100 ST has a Capacity of 1089.0 ccm (66.45 cubic inches).
What engine power does the Kawasaki Z 1100 ST have?
The 1981 Kawasaki Z 1100 ST has a Power of 97.0 HP (71.3 kW) @ 8000 RPM.
How many gears does the Kawasaki Z 1100 ST have?
The 1981 Kawasaki Z 1100 ST has a Gearbox of 5-speed.
How much does the Kawasaki Z 1100 ST weigh?
The 1981 Kawasaki Z 1100 ST has a Wet weight of 271.0 kg (597.5 pounds).
Shop this bike
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The 1981 Kawasaki Z 1100 ST is a powerful and iconic motorcycle that has stood the test of time. With its 1100cc engine, it delivers an exhilarating ride that will satisfy even the most seasoned riders. The classic design and solid build quality make it a standout choice for motorcycle enthusiasts looking for a reliable and enduring machine.
The 1981 Kawasaki Z 1100 ST is a timeless classic that continues to impress riders decades after its release. Its powerful performance and enduring design make it a top choice for motorcycle enthusiasts. Whether you're a veteran rider or a newcomer to the sport, the Z 1100 ST offers a thrilling and reliable ride that is sure to impress.
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