Yamaha YH 50 vs Piaggio NRG

The Yamaha YH 50 passes its MOT first time more often than the Piaggio NRG: 73.9% vs 65.5%, a 8.4-point lead.

MOT reliability, side by side

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

Metric	Yamaha YH 50	Piaggio NRG
First-time pass rate	73.9%	65.5%
Outright fail rate	18.1%	27.4%
Median miles at test	7,324	9,874
MOT tests analysed	2,505	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.

YAMAHA YH 50 73.9% pass · 2,505 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.