YAMAHA XJ400
Pass rate over time
The XJ400's first-time pass rate has fallen 4.4 points since 2006, 74.1% to 69.7%.
Pass rate by mileage
A low-mileage XJ400 passes first time 75.4% of the time; by 40k that's 76.5%.
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 XJ400
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| steering and suspension |
|
54 | 28.1 |
| lighting and signalling |
|
38 | 19.8 |
| brakes |
|
37 | 19.3 |
| tyres and wheels |
|
22 | 11.5 |
| drive system |
|
19 | 9.9 |
| fuel and exhaust |
|
11 | 5.7 |
| body and structure |
|
4 | 2.1 |
| Items Not Tested |
|
3 | 1.6 |
| reg plates and vin |
|
2 | 1 |
| driving controls |
|
2 | 1 |
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 XJ400 beats 0 of its 4 closest rivals (KAWASAKI ER5, SUZUKI GS500, SUZUKI AN400).
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 XJ400.
Pass rate by registration year
Best year to buy used: 1993 (79.3% pass). Weakest: 1991 (68.2%).
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.