Znen ZN 50 QT-51 Flair vs Piaggio NRG

The Piaggio NRG passes its MOT first time more often than the Znen ZN 50 QT-51 Flair — 65.5% vs 63.3%, a 2.2-point lead.

MOT reliability, side by side

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

Metric	Znen ZN 50 QT-51 Flair	Piaggio NRG
First-time pass rate	63.3%	65.5%
Outright fail rate	28.9%	27.4%
Median miles at test	5,089	9,874
MOT tests analysed	128	40,458
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.

ZNEN ZN 50 QT-51 FLAIR 63.3% pass · 128 tests PIAGGIO NRG 65.5% pass · 40.5k tests

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