KAWASAKI ZX 900-B4
Pass rate over time
The ZX 900-B4's first-time pass rate has fallen 7.1 points since 2006, 82.9% to 75.8%.
Pass rate by mileage
A low-mileage ZX 900-B4 passes first time 83.3% of the time; by 30k that's 81.0%.
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 ZX 900-B4
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| brakes |
|
17 | 32.1 |
| steering and suspension |
|
14 | 26.4 |
| lighting and signalling |
|
7 | 13.2 |
| tyres and wheels |
|
7 | 13.2 |
| body and structure |
|
2 | 3.8 |
| fuel and exhaust |
|
2 | 3.8 |
| reg plates and vin |
|
1 | 1.9 |
| structure and attachments |
|
1 | 1.9 |
| tyres |
|
1 | 1.9 |
| driving controls |
|
1 | 1.9 |
Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.
How rivals compare
On first-time pass rate the ZX 900-B4 beats 0 of its 4 closest rivals (BMW R1150, TRIUMPH SPRINT, SUZUKI GSF1200).
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 ZX 900-B4.
Pass rate by registration year
Best year to buy used: 1997 (80.6% pass). Weakest: 1997 (80.6%).
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.