Derbi Terra 125 vs Gilera Runner

The Gilera Runner passes its MOT first time more often than the Derbi Terra 125 — 70.8% vs 67.7%, a 3.1-point lead.

MOT reliability, side by side

first-time pass rate, outright fail rate and tests analysed · 2005–2025

Metric	Derbi Terra 125	Gilera Runner
First-time pass rate	67.7%	70.8%
Outright fail rate	24.3%	21.5%
Median miles at test	6,802	11,381
MOT tests analysed	613	69,850
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.

DERBI TERRA 125 67.7% pass · 613 tests GILERA RUNNER 70.8% pass · 69.9k tests

See each bike's full report — trend, mileage curve, failure breakdown and rivals — on its own page.