Pass rate over time
The 620's first-time pass rate has risen 1.8 points since 2006, 75.6% to 77.4%.
Pass rate by mileage
A low-mileage 620 passes first time 81.0% of the time; by 20k that's 67.7%.
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 620
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| lighting and signalling |
|
68 | 43 |
| steering and suspension |
|
23 | 14.6 |
| lamps and reflectors |
|
20 | 12.7 |
| brakes |
|
15 | 9.5 |
| reg plates and vin |
|
10 | 6.3 |
| tyres and wheels |
|
9 | 5.7 |
| drive system |
|
4 | 2.5 |
| suspension |
|
3 | 1.9 |
| fuel and exhaust |
|
3 | 1.9 |
| structure and attachments |
|
3 | 1.9 |
Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.
How rivals compare
On first-time pass rate the 620 beats 1 of its 4 closest rivals (KAWASAKI ZX-6R, SUZUKI GSF600, YAMAHA FZS600).
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 620.
Pass rate by registration year
Best year to buy used: 1998 (78.3% pass). Weakest: 1996 (77.2%).
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.