Data as of: DVSA MOT results to 2025
Herald Motor Company SM 125-25B Classic vs Yamaha YBR 125
The Yamaha YBR 125 passes its MOT first time more often than the Herald Motor Company SM 125-25B Classic: 71.0% vs 69.4%, a 1.6-point lead.
MOT reliability, side by side
| Metric | Herald Motor Company SM 125-25B Classic | Yamaha YBR 125 |
|---|---|---|
| First-time pass rate | 69.4% | 71.0% |
| Outright fail rate | 22.5% | 17.1% |
| Vs comparable bikes (age & mileage adjusted) | -7.5 pts | -1.1 pts |
| Engine size | 124cc | 124cc |
| Median miles at test | 3,297 | 10,652 |
| MOT tests analysed | 173 | 124,897 |
| Most common failure | brakes | brakes |
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.