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MotoLibrary Score
50/100Balanced
Power
50 HP
Top Speed
173 km/h
Engine
553 ccm
Technical Overview
1981 Kawasaki Z 550 Technical Analysis & Specification Breakdown
Positioned in Kawasaki's classic motorcycle lineup, the 1981 Kawasaki Z 550 relies on a 553 cc (33.7 cu in) air-cooled in-line four, four-stroke powerplant. In factory specification, peak output is rated at 50 HP (36.5 kW) at 8,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 90.4 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the Z 550 measures 216 kg (476 lbs) wet (curb), translating to a power-to-weight ratio of 0.23 HP/kg (4.32 kg per horsepower). The 14-liter (3.7 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 173 km/h (107 mph).
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
