Derbi Senda Xtreme DRD SM 50 vs Piaggio Zip

The Piaggio Zip passes its MOT first time more often than the Derbi Senda Xtreme DRD SM 50 — 71.3% vs 59.0%, a 12.3-point lead.

MOT reliability, side by side

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

Metric	Derbi Senda Xtreme DRD SM 50	Piaggio Zip
First-time pass rate	59.0%	71.3%
Outright fail rate	25.0%	20.4%
Median miles at test	5,718	8,882
MOT tests analysed	188	78,993
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.

DERBI SENDA XTREME DRD SM 50 59.0% pass · 188 tests PIAGGIO ZIP 71.3% pass · 79.0k tests

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