Data as of: DVSA MOT results to 2025
Pgo G-Max vs Piaggio Zip
The Pgo G-Max passes its MOT first time more often than the Piaggio Zip: 73.5% vs 71.3%, a 2.2-point lead.
MOT reliability, side by side
| Metric | Pgo G-Max | Piaggio Zip |
|---|---|---|
| First-time pass rate | 73.5% | 71.3% |
| Outright fail rate | 18.0% | 20.4% |
| Vs comparable bikes (age & mileage adjusted) | +1.8 pts | -1.0 pts |
| Engine size | 50cc | 49cc |
| Rank among all models | #4452 of 5428 | #4631 of 5428 |
| Median miles at test | 10,938 | 8,882 |
| MOT tests analysed | 908 | 78,993 |
| Most common failure | brakes | 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 | Pgo G-Max | Piaggio Zip |
|---|---|---|
| Lights & signalling | 8.7% | 11.9% |
| Brakes | 8.3% | 6.5% |
| Steering & suspension | 3.1% | 9.2% |
| Tyres & wheels | 6.4% | 4.0% |
| Fuel & exhaust | 1.5% | 2.5% |
| Structure & body | 2.3% | 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 | Pgo G-Max | Piaggio Zip |
|---|---|---|
| 2012 | 65.0% | 69.1% |
| 2013 | 75.0% | 69.7% |
| 2014 | 68.0% | 68.8% |
| 2015 | 75.0% | 69.8% |
| 2016 | 77.8% | 71.0% |
| 2017 | 79.4% | 71.7% |
| 2018 | 62.8% | 72.9% |
| 2019 | 71.1% | 73.0% |
Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.
Pass rate by mileage
| Mileage | Pgo G-Max | Piaggio Zip |
|---|---|---|
| 0k-10k miles | 79.3% | 75.2% |
| 10k-20k miles | 69.3% | 66.7% |
| 20k-30k miles | 64.4% | 64.4% |
| 30k-40k miles | 84.8% | 64.5% |
Bands with fewer than 30 tests for either bike are left out.
Pgo G-Max vs Piaggio Zip FAQ
Which is more reliable, the Pgo G-Max or the Piaggio Zip?
The Pgo G-Max passes its MOT first time more often than the Piaggio Zip: 73.5% vs 71.3%, a 2.2-point lead. Adjusted for age, mileage and test class, the Pgo G-Max still comes out ahead: +1.8 points vs comparable bikes for the Pgo G-Max, -1.0 for the Piaggio Zip. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the Pgo G-Max fail its MOT on most?
Lights & signalling: 8.7% of Pgo G-Max MOT tests failed on it, then brakes (8.3%).
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%).
Which holds up better at high mileage, the Pgo G-Max or the Piaggio Zip?
At 30k-40k miles the Pgo G-Max passes first time more often: 84.8% for the Pgo G-Max vs 64.5% for the Piaggio Zip.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.