Model report · 2005–2025
BSA B25S
250cc
Petrol
Class 2
87.9%
first-time pass rate
7.8%
failed outright
12,405
median miles at test
116
MOT tests, 2005–2025
What fails on a B25S
failure defects by component group · advisories excluded
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| steering and suspension |
|
8 | 34.8 |
| brakes |
|
4 | 17.4 |
| tyres and wheels |
|
3 | 13 |
| lighting and signalling |
|
3 | 13 |
| drive system |
|
2 | 8.7 |
| body and structure |
|
1 | 4.3 |
| reg plates and vin |
|
1 | 4.3 |
| fuel and exhaust |
|
1 | 4.3 |
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 B25S beats 4 of its 4 closest rivals (YAMAHA YP250, YAMAHA WR250F, HONDA XR250).
YAMAHA
YP250
82.5% pass · 12.4k tests
YAMAHA
WR250F
78.0% pass · 10.5k tests
HONDA
XR250
78.8% pass · 9,277 tests
HONDA
CBF250
84.9% pass · 7,536 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 B25S.