Head-to-head · 2005–2025
Mutt Mongrel 125 vs Gilera Runner
The Gilera Runner passes its MOT first time more often than the Mutt Mongrel 125 — 70.8% vs 69.0%, a 1.8-point lead.
MOT reliability, side by side
first-time pass rate, outright fail rate and tests analysed · 2005–2025
| Metric | Mutt Mongrel 125 | Gilera Runner |
|---|---|---|
| First-time pass rate | 69.0% | 70.8% |
| Outright fail rate | 19.9% | 21.5% |
| Median miles at test | 3,762 | 11,381 |
| MOT tests analysed | 3,527 | 69,850 |
| Most common failure | lamps and reflectors | 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.