Data as of: DVSA MOT results to 2025
Honda SH 125 Ad-L vs Yamaha YBR 125
The Honda SH 125 Ad-L passes its MOT first time more often than the Yamaha YBR 125: 86.0% vs 71.0%, a 15.0-point lead.
MOT reliability, side by side
| Metric | Honda SH 125 Ad-L | Yamaha YBR 125 |
|---|---|---|
| First-time pass rate | 86.0% | 71.0% |
| Outright fail rate | 9.9% | 17.1% |
| Vs comparable bikes (age & mileage adjusted) | +12.4 pts | -1.1 pts |
| Engine size | 125cc | 124cc |
| Rank among all models | #2197 of 5428 | #4664 of 5428 |
| Median miles at test | 30,751 | 10,652 |
| MOT tests analysed | 4,041 | 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.
What fails, side by side
| Component | Honda SH 125 Ad-L | Yamaha YBR 125 |
|---|---|---|
| Lights & signalling | 4.3% | 8.5% |
| Brakes | 3.9% | 5.9% |
| Steering & suspension | 3.2% | 6.5% |
| Tyres & wheels | 3.1% | 4.4% |
| Structure & body | 0.5% | 3.8% |
| Drive system | 0% | 2.9% |
| Fuel & exhaust | 0% | 0.6% |
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 | Honda SH 125 Ad-L | Yamaha YBR 125 |
|---|---|---|
| 2021 | 84.0% | 71.6% |
| 2022 | 88.0% | 71.3% |
| 2023 | 86.0% | 71.1% |
| 2024 | 86.0% | 70.9% |
| 2025 | 85.9% | 71.2% |
Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.
Pass rate by mileage
| Mileage | Honda SH 125 Ad-L | Yamaha YBR 125 |
|---|---|---|
| 0k-10k miles | 93.9% | 76.8% |
| 10k-20k miles | 87.5% | 67.4% |
| 20k-30k miles | 86.0% | 63.8% |
| 30k-40k miles | 82.6% | 62.2% |
| 40k-50k miles | 85.0% | 63.4% |
| 50k-60k miles | 81.6% | 63.6% |
Bands with fewer than 30 tests for either bike are left out.
Honda SH 125 Ad-L vs Yamaha YBR 125 FAQ
Which is more reliable, the Honda SH 125 Ad-L or the Yamaha YBR 125?
The Honda SH 125 Ad-L passes its MOT first time more often than the Yamaha YBR 125: 86.0% vs 71.0%, a 15.0-point lead. Adjusted for age, mileage and test class, the Honda SH 125 Ad-L still comes out ahead: +12.4 points vs comparable bikes for the Honda SH 125 Ad-L, -1.1 for the Yamaha YBR 125. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the Honda SH 125 Ad-L fail its MOT on most?
Lights & signalling: 4.3% of Honda SH 125 Ad-L MOT tests failed on it, then brakes (3.9%).
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 Honda SH 125 Ad-L or the Yamaha YBR 125?
At 50k-60k miles the Honda SH 125 Ad-L passes first time more often: 81.6% for the Honda SH 125 Ad-L vs 63.6% for the Yamaha YBR 125.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.