Naked Motorcycles
1990Kawasaki ZR 550B Zephyr
19 fields on record
The 1990 Kawasaki ZR 550B Zephyr is a lightweight naked bike ideal for new riders and commuters seeking accessible performance. Its 553cc four-cylinder engine delivers smooth, manageable power with excellent fuel efficiency. Known for its nimble handling and retro styling, it remains a popular entry-level sportbike that balances practicality with engaging ride dynamics.
- Capacity
- 553.0 ccm
- Engine
- In-line four
- Gearbox
- 6-speed
- Wet weight
- 206.0 kg
- Seat height
- Not on record
Know it? Add it → - Power
- 50.0 HP (36.8 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- A retro-styled naked bike built for enjoyable everyday street riding, commuting, and casual weekend rides rather than outright performance.
- Built for
- Offers a smooth, revvy air-cooled four-cylinder feel with classic UJM styling and dependable, unintimidating manners.
- Not ideal for
- Not suited for riders seeking high top-end power, long-distance touring comfort, or any off-road capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 553.0 ccm
- Power
- 50.0 HP (36.8 kW)
- Engine type
- In-line four
- Power/weight ratio
- 0.2427 HP/kg (wet)
- Bore x stroke
- 58.0 x 52.4 mm
- Compression
- 9.5:1
- Cooling system
- Oil & air
- Fuel system
- Carburettor
- Starting
- Electric
- Valves per cylinder
- 2
- Lubrication system
- Wet Sump
- Torque
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet Plate
Performance
- Top speed
- 220.5 km/h (137.0 mph)
Dimensions & weight
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
Rider Reviews
Common questions
What is the engine size of the Kawasaki ZR 550B Zephyr?
The 1990 Kawasaki ZR 550B Zephyr has a Capacity of 553.0 ccm (33.75 cubic inches).
What engine power does the Kawasaki ZR 550B Zephyr have?
The 1990 Kawasaki ZR 550B Zephyr has a Power of 50.0 HP (36.8 kW).
How many gears does the Kawasaki ZR 550B Zephyr have?
The 1990 Kawasaki ZR 550B Zephyr has a Gearbox of 6-speed.
How much does the Kawasaki ZR 550B Zephyr weigh?
The 1990 Kawasaki ZR 550B Zephyr has a Wet weight of 206.0 kg (454.2 pounds).
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