Data as of: DVSA MOT results to 2025
SYM Jet 100 - Euro X vs Yamaha Nmax 125
The Yamaha Nmax 125 passes its MOT first time more often than the SYM Jet 100 - Euro X: 82.2% vs 76.2%, a 6.0-point lead.
MOT reliability, side by side
| Metric | SYM Jet 100 - Euro X | Yamaha Nmax 125 |
|---|---|---|
| First-time pass rate | 76.2% | 82.2% |
| Outright fail rate | 16.2% | 11.4% |
| Vs comparable bikes (age & mileage adjusted) | +6.4 pts | +9.5 pts |
| Engine size | 101cc | 125cc |
| Rank among all models | #4162 of 5428 | #3145 of 5428 |
| Median miles at test | 13,402 | 30,236 |
| MOT tests analysed | 563 | 33,779 |
| 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 | SYM Jet 100 - Euro X | Yamaha Nmax 125 |
|---|---|---|
| Lights & signalling | 8.5% | 4.2% |
| Brakes | 5.0% | 5.3% |
| Steering & suspension | 4.3% | 5.0% |
| Tyres & wheels | 3.9% | 3.7% |
| Fuel & exhaust | 3.0% | 0% |
| Structure & body | 2.0% | 0.6% |
| Drive system | 0.4% | 0% |
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 mileage
| Mileage | SYM Jet 100 - Euro X | Yamaha Nmax 125 |
|---|---|---|
| 0k-10k miles | 81.2% | 90.9% |
| 10k-20k miles | 77.0% | 84.2% |
| 20k-30k miles | 68.5% | 81.9% |
Bands with fewer than 30 tests for either bike are left out.
SYM Jet 100 - Euro X vs Yamaha Nmax 125 FAQ
Which is more reliable, the SYM Jet 100 - Euro X or the Yamaha Nmax 125?
The Yamaha Nmax 125 passes its MOT first time more often than the SYM Jet 100 - Euro X: 82.2% vs 76.2%, a 6.0-point lead. Adjusted for age, mileage and test class, the Yamaha Nmax 125 still comes out ahead: +6.4 points vs comparable bikes for the SYM Jet 100 - Euro X, +9.5 for the Yamaha Nmax 125. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the SYM Jet 100 - Euro X fail its MOT on most?
Lights & signalling: 8.5% of SYM Jet 100 - Euro X MOT tests failed on it, then brakes (5.0%).
What does the Yamaha Nmax 125 fail its MOT on most?
Brakes: 5.3% of Yamaha Nmax 125 MOT tests failed on it, then steering & suspension (5.0%).
Which holds up better at high mileage, the SYM Jet 100 - Euro X or the Yamaha Nmax 125?
At 20k-30k miles the Yamaha Nmax 125 passes first time more often: 68.5% for the SYM Jet 100 - Euro X vs 81.9% for the Yamaha Nmax 125.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.