Head-to-head · 2005–2025
Data as of: DVSA MOT results to 2025
Ajp PR4 vs Yamaha YBR 125
The Ajp PR4 passes its MOT first time more often than the Yamaha YBR 125: 74.1% vs 71.0%, a 3.1-point lead.
MOT reliability, side by side
first-time pass rate, outright fail rate and tests analysed · 2005–2025
| Metric | Ajp PR4 | Yamaha YBR 125 |
|---|---|---|
| First-time pass rate | 74.1% | 71.0% |
| Outright fail rate | 16.7% | 17.1% |
| Vs comparable bikes (age & mileage adjusted) | -6.7 pts | -1.1 pts |
| Engine size | 124cc | 124cc |
| Rank among all models | #4387 of 5428 | #4664 of 5428 |
| Median miles at test | 2,461 | 10,652 |
| MOT tests analysed | 293 | 124,897 |
| Most common failure | lighting and signalling | 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.