What category is the 1990 Kawasaki GPZ 550 (reduced Effect)?

The 1990 Kawasaki GPZ 550 (reduced Effect) has a Category of Unspecified category.

What is the engine size of the 1990 Kawasaki GPZ 550 (reduced Effect)?

The 1990 Kawasaki GPZ 550 (reduced Effect) has a Capacity: of 553.00 ccm (33.74 cubic inches).

What type of engine does the 1990 Kawasaki GPZ 550 (reduced Effect) have?

The 1990 Kawasaki GPZ 550 (reduced Effect) has a Engine type of In-line four.

What is the engine power of the 1990 Kawasaki GPZ 550 (reduced Effect)?

The 1990 Kawasaki GPZ 550 (reduced Effect) has a Power of 50.00.

Is the 1990 Kawasaki GPZ 550 (reduced Effect) air cooled or liquid cooled?

The 1990 Kawasaki GPZ 550 (reduced Effect) has a Cooling system of Air.

How many gears does the 1990 Kawasaki GPZ 550 (reduced Effect) have?

The 1990 Kawasaki GPZ 550 (reduced Effect) has a Gearbox of 6-speed.

How much does the 1990 Kawasaki GPZ 550 (reduced Effect) weigh?

The 1990 Kawasaki GPZ 550 (reduced Effect) has a Weight incl. oil, gas, etc of 209.0 kg (460.8 pounds).

What is the top speed of the 1990 Kawasaki GPZ 550 (reduced Effect)?

The 1990 Kawasaki GPZ 550 (reduced Effect) has a Top speed of 176.0 km/h (109.4 mph).

Kawasaki GPZ 550 (reduced Effect) - 1990 Specifications and Reviews

Name: 1990 Kawasaki GPZ 550 (reduced Effect)
Brand: Kawasaki

The 1990 Kawasaki GPZ 550 is an accessible middleweight sportbike ideal for riders seeking lively performance without overwhelming complexity. Its 553cc inline-four engine delivers spirited acceleration while remaining manageable, making it well-suited for enthusiasts wanting genuine sport character on a practical, lightweight platform. Known for its responsive handling and reliable air-cooled mechanics, it remains a capable daily rider.

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1990

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General information
Category	Unspecified category
Year	1990
Model	Kawasaki GPZ 550 (reduced effect)
Engine and Transmission Specifications
Transmission typefinal drive	Chain
Gearbox	6-speed
Cooling system	Air
Fuel control	DOHC
Valves per cylinder	2
Bore x stroke	58.0 x 52.4 mm (2.3 x 2.1 inches)
Compression	10.0:1
Power	50.00
Stroke	4
Engine type	In-line four
Capacity:	553.00 ccm (33.74 cubic inches)
Physical measures and capacities
Weight incl. oil, gas, etc	209.0 kg (460.8 pounds)

Kawasaki GPZ 550 (reduced Effect) dimensions and frame
Rear brakes	Single disc
Front brakes	Dual disc
Rear tyre dimensions	120/80-18
Front tyre dimensions	100/90-18
Speed and acceleration
Top speed	176.0 km/h (109.4 mph)
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Fuel capacity	18.00 litres (4.76 gallons)

Performance Profile & Rider Fit

50 hp

Peak Power

5.8s

0-60 mph

109.4 mph

Top Speed

Best For

Track35%

City60%

Cornering55%

Daily Riding60%

Touring45%

Passenger45%

Rider Profile

Best For	This is a restricted, detuned version of the GPZ550 (note the 'reduced effect' designation and lower-than-stock power figure of 50hp), likely built to meet learner or licensing power limits, so it suits newer riders stepping up from smaller bikes.
Purpose	It works best as an approachable, everyday standard-style bike for commuting and learning the ropes of a four-cylinder machine rather than for outright performance.
Rider Fit	The moderate 209kg weight and 18-inch wheels make it manageable for riders of average height and strength, with an upright-ish stance typical of early UJM-style sportbikes.
Character	It has a smooth, air-cooled inline-four character with a soft, linear power delivery rather than an aggressive top-end rush, reflecting its restricted output.
Not Ideal For	It is not the right choice for riders seeking genuine sport-bike performance, high top speed, or off-road capability.

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