Data as of: DVSA MOT results to 2025
Baotian BT 50 QT-9 vs Piaggio Zip
The Piaggio Zip passes its MOT first time more often than the Baotian BT 50 QT-9: 71.3% vs 62.0%, a 9.3-point lead.
MOT reliability, side by side
| Metric | Baotian BT 50 QT-9 | Piaggio Zip |
|---|---|---|
| First-time pass rate | 62.0% | 71.3% |
| Outright fail rate | 27.4% | 20.4% |
| Vs comparable bikes (age & mileage adjusted) | -13.9 pts | -1.0 pts |
| Engine size | 49cc | 49cc |
| Rank among all models | #5145 of 5428 | #4631 of 5428 |
| Median miles at test | 4,324 | 8,882 |
| MOT tests analysed | 1,910 | 78,993 |
| Most common failure | lighting and signalling | lighting and signalling |
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 | Baotian BT 50 QT-9 | Piaggio Zip |
|---|---|---|
| Lights & signalling | 18.6% | 11.9% |
| Steering & suspension | 10.3% | 9.2% |
| Brakes | 9.7% | 6.5% |
| Tyres & wheels | 5.2% | 4.0% |
| Fuel & exhaust | 2.2% | 2.5% |
| Structure & body | 2.0% | 1.6% |
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 | Baotian BT 50 QT-9 | Piaggio Zip |
|---|---|---|
| 2010 | 63.3% | 70.8% |
| 2011 | 61.7% | 69.7% |
| 2012 | 63.9% | 69.1% |
| 2013 | 56.1% | 69.7% |
| 2014 | 57.9% | 68.8% |
| 2015 | 61.0% | 69.8% |
| 2016 | 70.7% | 71.0% |
| 2017 | 56.8% | 71.7% |
Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.
Pass rate by mileage
| Mileage | Baotian BT 50 QT-9 | Piaggio Zip |
|---|---|---|
| 0k-10k miles | 62.9% | 75.2% |
| 10k-20k miles | 53.7% | 66.7% |
Bands with fewer than 30 tests for either bike are left out.
Baotian BT 50 QT-9 vs Piaggio Zip FAQ
Which is more reliable, the Baotian BT 50 QT-9 or the Piaggio Zip?
The Piaggio Zip passes its MOT first time more often than the Baotian BT 50 QT-9: 71.3% vs 62.0%, a 9.3-point lead. Adjusted for age, mileage and test class, the Piaggio Zip still comes out ahead: -13.9 points vs comparable bikes for the Baotian BT 50 QT-9, -1.0 for the Piaggio Zip. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the Baotian BT 50 QT-9 fail its MOT on most?
Lights & signalling: 18.6% of Baotian BT 50 QT-9 MOT tests failed on it, then steering & suspension (10.3%).
What does the Piaggio Zip fail its MOT on most?
Lights & signalling: 11.9% of Piaggio Zip MOT tests failed on it, then steering & suspension (9.2%).
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.