Head-to-head · 2005–2025
Cpi Formula R 50 vs Piaggio Zip
The Piaggio Zip passes its MOT first time more often than the Cpi Formula R 50 — 71.3% vs 57.0%, a 14.3-point lead.
MOT reliability, side by side
first-time pass rate, outright fail rate and tests analysed · 2005–2025
| Metric | Cpi Formula R 50 | Piaggio Zip |
|---|---|---|
| First-time pass rate | 57.0% | 71.3% |
| Outright fail rate | 29.1% | 20.4% |
| Median miles at test | 5,242 | 8,882 |
| MOT tests analysed | 440 | 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.
See each bike's full report — trend, mileage curve, failure breakdown and rivals — on its own page.