KAWASAKI Z900A4

903cc Petrol Class 2

#468 of 5426 overall #55 of 592 KAWASAKIs #23 of 205 naked bikes

92.0%

first-time pass rate

4.5%

failed outright

31,460

median miles at test

311

MOT tests, 2005–2025

Pass rate by mileage

how the Z900A4's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage Z900A4 passes first time 93.0% of the time; by 40k that's 92.5%.

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a Z900A4

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	14	46.7
brakes	7	23.3
steering and suspension	4	13.3
fuel and exhaust	3	10
reg plates and vin	2	6.7

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the Z900A4 beats 4 of its 4 closest rivals (TRIUMPH SPEED TRIPLE, TRIUMPH STREET TRIPLE, APRILIA TUONO).

TRIUMPH SPEED TRIPLE 85.6% pass · 74.6k tests TRIUMPH STREET TRIPLE 87.7% pass · 37.7k tests APRILIA TUONO 88.4% pass · 34.7k tests TRIUMPH TRIDENT 85.0% pass · 23.9k tests

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the Z900A4.

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 1976 (91.9% pass). Weakest: 1976 (91.9%).

First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.