Model report · 2005–2025
88.3%
first-time pass rate
5.7%
failed outright
7,144
median miles at test
247
MOT tests, 2005–2025
What fails on a B25SS
failure defects by component group · advisories excluded
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| steering and suspension |
|
10 | 37 |
| lighting and signalling |
|
5 | 18.5 |
| tyres and wheels |
|
5 | 18.5 |
| driving controls |
|
4 | 14.8 |
| brakes |
|
2 | 7.4 |
| reg plates and vin |
|
1 | 3.7 |
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 B25SS 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 B25SS.
Pass rate by registration year
how each model-year cohort fares · registration year from first use date
Best year to buy used: 1971 (89.3% pass). Weakest: 1971 (89.3%).
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.