Head-to-head · 2005–2025
Data as of: DVSA MOT results to 2025
Ariel 350 vs Suzuki DR-Z400S
The Ariel 350 passes its MOT first time more often than the Suzuki DR-Z400S: 92.7% vs 80.4%, a 12.3-point lead.
MOT reliability, side by side
first-time pass rate, outright fail rate and tests analysed · 2005–2025
| Metric | Ariel 350 | Suzuki DR-Z400S |
|---|---|---|
| First-time pass rate | 92.7% | 80.4% |
| Outright fail rate | 4.0% | 11.1% |
| Engine size | 350cc | 398cc |
| Median miles at test | 30,325 | 6,940 |
| MOT tests analysed | 151 | 26,773 |
| Most common failure | lighting and signalling | lighting and signalling |
First-time outcomes on normal tests, 2005–2025. "Most common failure" is the component group with the most recorded defects on failed tests. Read pass rates against test counts: a smaller sample is noisier. Source: DVSA anonymised MOT results.
Pass rate by mileage
first-time MOT pass rate by miles on the clock at test
| Mileage | Ariel 350 | Suzuki DR-Z400S |
|---|---|---|
| 0k-10k miles | 92.5% | 81.7% |
| 30k-40k miles | 97.6% | 76.4% |
Bands with fewer than 30 tests for either bike are left out.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.