Cpi GTR vs Piaggio NRG

The Piaggio NRG passes its MOT first time more often than the Cpi GTR: 65.5% vs 62.2%, a 3.3-point lead.

MOT reliability, side by side

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

Metric	Cpi GTR	Piaggio NRG
First-time pass rate	62.2%	65.5%
Outright fail rate	30.1%	27.4%
Vs comparable bikes (age & mileage adjusted)	-13.1 pts	-6.0 pts
Engine size	49cc	49cc
Rank among all models	#5138 of 5428	#4992 of 5428
Median miles at test	4,519	9,874
MOT tests analysed	621	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.

"Vs comparable bikes" is the first-time pass rate minus the rate expected for each bike's own mix of age, mileage and test class, in percentage points: positive means better than comparable bikes. How this works.

What fails, side by side

share of each bike's MOT tests that failed on the component · lower is better

Component	Cpi GTR	Piaggio NRG
Lights & signalling	19.6%	15.0%
Steering & suspension	17.1%	15.5%
Brakes	6.8%	10.2%
Tyres & wheels	3.5%	4.7%
Structure & body	5.6%	2.5%
Fuel & exhaust	1.0%	3.8%

A test that fails on two components counts once in each. Component links go to the bikes most likely to fail on it.

Pass rate by test year

first-time MOT pass rate in each calendar year both bikes were tested

Test year	Cpi GTR	Piaggio NRG
2008	46.9%	65.2%
2009	60.9%	62.2%
2010	60.6%	63.2%
2011	60.0%	63.9%
2012	67.1%	63.4%
2013	59.4%	64.1%
2014	54.5%	67.4%
2015	62.5%	68.8%

Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	Cpi GTR	Piaggio NRG
0k-10k miles	62.7%	71.3%
10k-20k miles	61.9%	60.6%

Bands with fewer than 30 tests for either bike are left out.

Cpi GTR vs Piaggio NRG FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Cpi GTR or the Piaggio NRG?

The Piaggio NRG passes its MOT first time more often than the Cpi GTR: 65.5% vs 62.2%, a 3.3-point lead. Adjusted for age, mileage and test class, the Piaggio NRG still comes out ahead: -13.1 points vs comparable bikes for the Cpi GTR, -6.0 for the Piaggio NRG. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Cpi GTR fail its MOT on most?

Lights & signalling: 19.6% of Cpi GTR MOT tests failed on it, then steering & suspension (17.1%).

What does the Piaggio NRG fail its MOT on most?

Steering & suspension: 15.5% of Piaggio NRG MOT tests failed on it, then lights & signalling (15.0%).

CPI GTR 62.2% pass · 621 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.