Model report · 2005–2025
73.1%
first-time pass rate
18.9%
failed outright
18,862
median miles at test
264
MOT tests, 2005–2025
Pass rate by mileage
how the 400's first-time pass rate falls with the odometer · class average 84.9%
A low-mileage 400 passes first time 73.2% of the time; by 30k that's 66.7%.
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 400
failure defects by component group · advisories excluded
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| lighting and signalling |
|
41 | 29.1 |
| steering and suspension |
|
39 | 27.7 |
| brakes |
|
29 | 20.6 |
| tyres and wheels |
|
8 | 5.7 |
| fuel and exhaust |
|
7 | 5 |
| body and structure |
|
5 | 3.5 |
| drive system |
|
4 | 2.8 |
| reg plates and vin |
|
4 | 2.8 |
| suspension |
|
2 | 1.4 |
| tyres |
|
2 | 1.4 |
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 400 beats 0 of its 4 closest rivals (KAWASAKI ER5, SUZUKI GS500, SUZUKI AN400).
KAWASAKI
ER5
77.4% pass · 53.1k tests
SUZUKI
GS500
76.4% pass · 44.9k tests
SUZUKI
AN400
86.2% pass · 27.1k tests
SUZUKI
DR-Z400S
80.4% pass · 26.8k 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 400.