Data as of: DVSA MOT results to 2025
Hyosung GT 125 R vs Yamaha YBR 125
The Yamaha YBR 125 passes its MOT first time more often than the Hyosung GT 125 R: 71.0% vs 58.2%, a 12.8-point lead.
MOT reliability, side by side
| Metric | Hyosung GT 125 R | Yamaha YBR 125 |
|---|---|---|
| First-time pass rate | 58.2% | 71.0% |
| Outright fail rate | 30.5% | 17.1% |
| Vs comparable bikes (age & mileage adjusted) | -13.7 pts | -1.1 pts |
| Engine size | 124cc | 124cc |
| Rank among all models | #5270 of 5428 | #4664 of 5428 |
| Median miles at test | 9,722 | 10,652 |
| MOT tests analysed | 2,286 | 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 | Hyosung GT 125 R | Yamaha YBR 125 |
|---|---|---|
| Lights & signalling | 18.5% | 8.5% |
| Brakes | 15.4% | 5.9% |
| Steering & suspension | 13.2% | 6.5% |
| Tyres & wheels | 5.8% | 4.4% |
| Drive system | 7.0% | 2.9% |
| Structure & body | 5.6% | 3.8% |
| Fuel & exhaust | 2.0% | 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 | Hyosung GT 125 R | Yamaha YBR 125 |
|---|---|---|
| 2016 | 56.6% | 71.3% |
| 2017 | 56.7% | 70.7% |
| 2018 | 62.5% | 72.0% |
| 2019 | 67.1% | 71.8% |
| 2020 | 58.5% | 73.4% |
| 2021 | 50.7% | 71.6% |
| 2022 | 52.2% | 71.3% |
| 2023 | 63.3% | 71.1% |
Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.
Pass rate by mileage
| Mileage | Hyosung GT 125 R | Yamaha YBR 125 |
|---|---|---|
| 0k-10k miles | 60.9% | 76.8% |
| 10k-20k miles | 56.6% | 67.4% |
| 20k-30k miles | 51.6% | 63.8% |
| 30k-40k miles | 62.7% | 62.2% |
Bands with fewer than 30 tests for either bike are left out.
Hyosung GT 125 R vs Yamaha YBR 125 FAQ
Which is more reliable, the Hyosung GT 125 R or the Yamaha YBR 125?
The Yamaha YBR 125 passes its MOT first time more often than the Hyosung GT 125 R: 71.0% vs 58.2%, a 12.8-point lead. Adjusted for age, mileage and test class, the Yamaha YBR 125 still comes out ahead: -13.7 points vs comparable bikes for the Hyosung GT 125 R, -1.1 for the Yamaha YBR 125. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the Hyosung GT 125 R fail its MOT on most?
Lights & signalling: 18.5% of Hyosung GT 125 R MOT tests failed on it, then brakes (15.4%).
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 Hyosung GT 125 R or the Yamaha YBR 125?
They are level: at 30k-40k miles the Hyosung GT 125 R passes 62.7% first time and the Yamaha YBR 125 62.2%.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.