Cpi Formula vs Piaggio NRG

The Piaggio NRG passes its MOT first time more often than the Cpi Formula — 65.5% vs 61.8%, a 3.7-point lead.

MOT reliability, side by side

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

Metric	Cpi Formula	Piaggio NRG
First-time pass rate	61.8%	65.5%
Outright fail rate	27.2%	27.4%
Median miles at test	3,144	9,874
MOT tests analysed	136	40,458
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.

CPI FORMULA 61.8% pass · 136 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.