Rieju RS1 vs Piaggio NRG

The Piaggio NRG passes its MOT first time more often than the Rieju RS1 — 65.5% vs 44.9%, a 20.6-point lead.

MOT reliability, side by side

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

Metric	Rieju RS1	Piaggio NRG
First-time pass rate	44.9%	65.5%
Outright fail rate	48.4%	27.4%
Median miles at test	9,474	9,874
MOT tests analysed	374	40,458
Most common failure	steering and suspension	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.

RIEJU RS1 44.9% pass · 374 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.