Data as of: DVSA MOT results to 2025
Keeway F-Act 50 vs Piaggio Zip
The Piaggio Zip passes its MOT first time more often than the Keeway F-Act 50: 71.3% vs 66.2%, a 5.1-point lead.
MOT reliability, side by side
| Metric | Keeway F-Act 50 | Piaggio Zip |
|---|---|---|
| First-time pass rate | 66.2% | 71.3% |
| Outright fail rate | 25.8% | 20.4% |
| Vs comparable bikes (age & mileage adjusted) | -7.7 pts | -1.0 pts |
| Engine size | 49cc | 49cc |
| Rank among all models | #4957 of 5428 | #4631 of 5428 |
| Median miles at test | 5,966 | 8,882 |
| MOT tests analysed | 710 | 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 | Keeway F-Act 50 | Piaggio Zip |
|---|---|---|
| Lights & signalling | 13.7% | 11.9% |
| Steering & suspension | 10.6% | 9.2% |
| Brakes | 12.1% | 6.5% |
| Tyres & wheels | 4.1% | 4.0% |
| Fuel & exhaust | 3.9% | 2.5% |
| Structure & body | 1.8% | 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 | Keeway F-Act 50 | Piaggio Zip |
|---|---|---|
| 2010 | 72.5% | 70.8% |
| 2011 | 68.2% | 69.7% |
| 2012 | 57.8% | 69.1% |
| 2013 | 68.6% | 69.7% |
| 2014 | 69.2% | 68.8% |
| 2015 | 63.0% | 69.8% |
| 2016 | 67.3% | 71.0% |
| 2017 | 62.8% | 71.7% |
Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.
Pass rate by mileage
| Mileage | Keeway F-Act 50 | Piaggio Zip |
|---|---|---|
| 0k-10k miles | 66.4% | 75.2% |
| 10k-20k miles | 67.2% | 66.7% |
Bands with fewer than 30 tests for either bike are left out.
Keeway F-Act 50 vs Piaggio Zip FAQ
Which is more reliable, the Keeway F-Act 50 or the Piaggio Zip?
The Piaggio Zip passes its MOT first time more often than the Keeway F-Act 50: 71.3% vs 66.2%, a 5.1-point lead. Adjusted for age, mileage and test class, the Piaggio Zip still comes out ahead: -7.7 points vs comparable bikes for the Keeway F-Act 50, -1.0 for the Piaggio Zip. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the Keeway F-Act 50 fail its MOT on most?
Lights & signalling: 13.7% of Keeway F-Act 50 MOT tests failed on it, then brakes (12.1%).
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.