Data as of: DVSA MOT results to 2025
Lambretta SX vs Piaggio X9
The Lambretta SX passes its MOT first time more often than the Piaggio X9: 88.7% vs 77.0%, a 11.7-point lead.
MOT reliability, side by side
| Metric | Lambretta SX | Piaggio X9 |
|---|---|---|
| First-time pass rate | 88.7% | 77.0% |
| Outright fail rate | 5.5% | 17.5% |
| Vs comparable bikes (age & mileage adjusted) | +7.0 pts | -4.4 pts |
| Engine size | 198cc | 244cc |
| Rank among all models | #1370 of 5428 | #4065 of 5428 |
| Median miles at test | 2,919 | 12,186 |
| MOT tests analysed | 1,580 | 21,703 |
| Most common failure | lighting and signalling | steering and suspension |
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 | Lambretta SX | Piaggio X9 |
|---|---|---|
| Lights & signalling | 2.4% | 7.3% |
| Steering & suspension | 1.5% | 7.5% |
| Brakes | 1.6% | 6.5% |
| Tyres & wheels | 1.1% | 4.2% |
| Fuel & exhaust | 0.4% | 1.8% |
| Structure & body | 0.1% | 0.8% |
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 | Lambretta SX | Piaggio X9 |
|---|---|---|
| 2011 | 86.8% | 75.7% |
| 2012 | 82.3% | 74.8% |
| 2013 | 90.3% | 74.1% |
| 2014 | 88.2% | 75.5% |
| 2015 | 87.9% | 76.1% |
| 2016 | 95.4% | 76.3% |
| 2017 | 92.1% | 76.3% |
| 2018 | 93.5% | 78.1% |
Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.
Pass rate by mileage
| Mileage | Lambretta SX | Piaggio X9 |
|---|---|---|
| 0k-10k miles | 89.0% | 81.4% |
| 10k-20k miles | 87.4% | 75.8% |
| 20k-30k miles | 88.2% | 72.4% |
| 30k-40k miles | 89.4% | 70.1% |
Bands with fewer than 30 tests for either bike are left out.
Lambretta SX vs Piaggio X9 FAQ
Which is more reliable, the Lambretta SX or the Piaggio X9?
The Lambretta SX passes its MOT first time more often than the Piaggio X9: 88.7% vs 77.0%, a 11.7-point lead. Adjusted for age, mileage and test class, the Lambretta SX still comes out ahead: +7.0 points vs comparable bikes for the Lambretta SX, -4.4 for the Piaggio X9. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the Lambretta SX fail its MOT on most?
Lights & signalling: 2.4% of Lambretta SX MOT tests failed on it, then brakes (1.6%).
What does the Piaggio X9 fail its MOT on most?
Steering & suspension: 7.5% of Piaggio X9 MOT tests failed on it, then lights & signalling (7.3%).
Which holds up better at high mileage, the Lambretta SX or the Piaggio X9?
At 30k-40k miles the Lambretta SX passes first time more often: 89.4% for the Lambretta SX vs 70.1% for the Piaggio X9.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.