Pass rate over time
The 100's first-time pass rate has risen 2.1 points since 2006, 90.2% to 92.3%.
Pass rate by mileage
A low-mileage 100 passes first time 86.9% of the time; by 20k that's 90.3%.
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 100
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| lighting and signalling |
|
17 | 56.7 |
| steering and suspension |
|
7 | 23.3 |
| tyres and wheels |
|
3 | 10 |
| brakes |
|
2 | 6.7 |
| sidecar |
|
1 | 3.3 |
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 100 beats 4 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 100.
Pass rate by registration year
Best year to buy used: 1956 (94.4% pass). Weakest: 1956 (94.4%).
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.