Model report · 2005–2025
91.0%
first-time pass rate
2.5%
failed outright
5,324
median miles at test
279
MOT tests, 2005–2025
What fails on a B50
failure defects by component group · advisories excluded
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| lighting and signalling |
|
5 | 35.7 |
| brakes |
|
3 | 21.4 |
| steering and suspension |
|
3 | 21.4 |
| fuel and exhaust |
|
2 | 14.3 |
| driving controls |
|
1 | 7.1 |
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 B50 beats 4 of its 4 closest rivals (KAWASAKI ZX-6R, SUZUKI GSF600, YAMAHA FZS600).
KAWASAKI
ZX-6R
78.1% pass · 174k tests
SUZUKI
GSF600
77.3% pass · 143k tests
YAMAHA
FZS600
82.6% pass · 137k tests
SUZUKI
SV650S
80.6% pass · 84.6k 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 B50.
Pass rate by registration year
how each model-year cohort fares · registration year from first use date
Best year to buy used: 1971 (93.0% pass). Weakest: 1971 (93.0%).
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.