Head-to-head · 2005–2025
Data as of: DVSA MOT results to 2025
Zontes S vs Yamaha WR250F
The Zontes S passes its MOT first time more often than the Yamaha WR250F: 90.0% vs 78.0%, a 12.0-point lead.
MOT reliability, side by side
first-time pass rate, outright fail rate and tests analysed · 2005–2025
| Metric | Zontes S | Yamaha WR250F |
|---|---|---|
| First-time pass rate | 90.0% | 78.0% |
| Outright fail rate | 7.3% | 12.8% |
| Vs comparable bikes (age & mileage adjusted) | +0.4 pts | -10.7 pts |
| Engine size | 249cc | 249cc |
| Median miles at test | 3,519 | 3,018 |
| MOT tests analysed | 110 | 10,465 |
| Most common failure | lamps and reflectors | 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.
"Vs comparable bikes" is the first-time pass rate minus the rate expected for each bike's own mix of age, mileage and test class, in percentage points: positive means better than comparable bikes. How this works.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.