Model report · 2005–2025
BSA ZB31
350cc
Petrol
Class 2
89.4%
first-time pass rate
3.2%
failed outright
2,181
median miles at test
94
MOT tests, 2005–2025
What fails on a ZB31
failure defects by component group · advisories excluded
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| steering and suspension |
|
2 | 25 |
| tyres and wheels |
|
2 | 25 |
| brakes |
|
1 | 12.5 |
| lighting and signalling |
|
1 | 12.5 |
| structure and attachments |
|
1 | 12.5 |
| suspension |
|
1 | 12.5 |
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 ZB31 beats 4 of its 4 closest rivals (SUZUKI AN400, SUZUKI DR-Z400S, YAMAHA RD350).
SUZUKI
AN400
86.2% pass · 27.1k tests
SUZUKI
DR-Z400S
80.4% pass · 26.8k tests
YAMAHA
RD350
86.3% pass · 19.6k tests
KAWASAKI
ZXR400
73.1% pass · 14.2k 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 ZB31.