What year Kawasaki Z550 G4 is most reliable?

Based on MOT first-test pass rates, the 1987 Kawasaki Z550 G4 has the highest pass rate at 92.9%, out of 329 vehicles tested.

What are the most common Kawasaki Z550 G4 MOT failures?

The most common Kawasaki Z550 G4 MOT failures vary by year. Check the individual year pages for detailed defect breakdowns — links in the table above.

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Kawasaki Z550 G4 — Reliability by Year

2,972 vehicles · MOT data 1987–1991 · first-test pass rates

This page shows MOT first-test pass rates for each year the Kawasaki Z550 G4 was manufactured — click any year to explore that cohort in detail. Trying to decide which year to buy? See the full buying guide →

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Best pass rate year

1987

92.9% pass rate · 329 vehicles

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Lowest pass rate year

1991

69.1% pass rate · 323 vehicles

Year	Pass rate	Avg mileage	Vehicles
1991	69.1%	31,596 mi	323
1990	86.6%	43,615 mi	737
1989	82.4%	37,807 mi	911
1988	75.1%	37,321 mi	672
1987	92.9%	44,939 mi	329

Which year Kawasaki Z550 G4 is most reliable?

MOT pass rate by year of manufacture — averaged across each vehicle's lifetime of tests. Green = noticeably above average for this model; red = noticeably below average.

Tests range from an average of 31,596 miles (newest year) to 44,939 miles (oldest year). Older years naturally accumulate more tests at higher mileages — see the mileage-normalised breakdown →

Trying to decide which year to buy?

We've done the full analysis — which years to look for, which to avoid, and where to find the best value for reliability on a Kawasaki Z550 G4.

See the buying guide →

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Check any UK registration — free MOT history and risk insights.