Data as of: DVSA MOT results to 2025
Aprilia SR 125 vs Yamaha YBR 125
The Yamaha YBR 125 passes its MOT first time more often than the Aprilia SR 125: 71.0% vs 69.3%, a 1.7-point lead.
MOT reliability, side by side
| Metric | Aprilia SR 125 | Yamaha YBR 125 |
|---|---|---|
| First-time pass rate | 69.3% | 71.0% |
| Outright fail rate | 24.2% | 17.1% |
| Vs comparable bikes (age & mileage adjusted) | -1.0 pts | -1.1 pts |
| Engine size | 125cc | 124cc |
| Rank among all models | #4785 of 5428 | #4664 of 5428 |
| Median miles at test | 15,112 | 10,652 |
| MOT tests analysed | 5,701 | 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.
What fails, side by side
| Component | Aprilia SR 125 | Yamaha YBR 125 |
|---|---|---|
| Lights & signalling | 13.4% | 8.5% |
| Steering & suspension | 11.5% | 6.5% |
| Brakes | 9.5% | 5.9% |
| Tyres & wheels | 6.2% | 4.4% |
| Structure & body | 1.9% | 3.8% |
| Fuel & exhaust | 3.6% | 0.6% |
| Drive system | 0.1% | 2.9% |
A test that fails on two components counts once in each. Component links go to the bikes most likely to fail on it.
Pass rate by test year
| Test year | Aprilia SR 125 | Yamaha YBR 125 |
|---|---|---|
| 2018 | 79.7% | 72.0% |
| 2019 | 78.9% | 71.8% |
| 2020 | 76.4% | 73.4% |
| 2021 | 82.6% | 71.6% |
| 2022 | 70.8% | 71.3% |
| 2023 | 78.3% | 71.1% |
| 2024 | 89.4% | 70.9% |
| 2025 | 83.0% | 71.2% |
Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.
Pass rate by mileage
| Mileage | Aprilia SR 125 | Yamaha YBR 125 |
|---|---|---|
| 0k-10k miles | 78.0% | 76.8% |
| 10k-20k miles | 67.0% | 67.4% |
| 20k-30k miles | 65.2% | 63.8% |
| 30k-40k miles | 62.4% | 62.2% |
| 40k-50k miles | 63.9% | 63.4% |
Bands with fewer than 30 tests for either bike are left out.
Aprilia SR 125 vs Yamaha YBR 125 FAQ
Which is more reliable, the Aprilia SR 125 or the Yamaha YBR 125?
The Yamaha YBR 125 passes its MOT first time more often than the Aprilia SR 125: 71.0% vs 69.3%, a 1.7-point lead. Adjusted for age, mileage and test class the two are level (-1.0 vs -1.1 points against comparable bikes), so the raw gap is mostly down to how old and how used each fleet is. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the Aprilia SR 125 fail its MOT on most?
Lights & signalling: 13.4% of Aprilia SR 125 MOT tests failed on it, then steering & suspension (11.5%).
What does the Yamaha YBR 125 fail its MOT on most?
Lights & signalling: 8.5% of Yamaha YBR 125 MOT tests failed on it, then steering & suspension (6.5%).
Which holds up better at high mileage, the Aprilia SR 125 or the Yamaha YBR 125?
They are level: at 40k-50k miles the Aprilia SR 125 passes 63.9% first time and the Yamaha YBR 125 63.4%.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.