Moto Roma Go Go 50 vs Piaggio NRG

The Moto Roma Go Go 50 passes its MOT first time more often than the Piaggio NRG: 70.8% vs 65.5%, a 5.3-point lead.

MOT reliability, side by side

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

Metric	Moto Roma Go Go 50	Piaggio NRG
First-time pass rate	70.8%	65.5%
Outright fail rate	19.6%	27.4%
Vs comparable bikes (age & mileage adjusted)	-2.7 pts	-6.0 pts
Engine size	49cc	49cc
Rank among all models	#4675 of 5428	#4992 of 5428
Median miles at test	6,788	9,874
MOT tests analysed	791	40,458
Most common failure	brakes	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	Moto Roma Go Go 50	Piaggio NRG
Steering & suspension	8.0%	15.5%
Lights & signalling	7.8%	15.0%
Brakes	9.6%	10.2%
Fuel & exhaust	3.5%	3.8%
Tyres & wheels	1.8%	4.7%
Structure & body	1.4%	2.5%

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	Moto Roma Go Go 50	Piaggio NRG
2006	71.4%	64.7%
2007	71.7%	63.9%
2008	70.5%	65.2%
2009	74.2%	62.2%
2010	67.2%	63.2%
2011	66.0%	63.9%
2012	67.5%	63.4%
2013	74.2%	64.1%

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	Moto Roma Go Go 50	Piaggio NRG
0k-10k miles	73.3%	71.3%
10k-20k miles	67.2%	60.6%

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

Moto Roma Go Go 50 vs Piaggio NRG FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Moto Roma Go Go 50 or the Piaggio NRG?

The Moto Roma Go Go 50 passes its MOT first time more often than the Piaggio NRG: 70.8% vs 65.5%, a 5.3-point lead. Adjusted for age, mileage and test class, the Moto Roma Go Go 50 still comes out ahead: -2.7 points vs comparable bikes for the Moto Roma Go Go 50, -6.0 for the Piaggio NRG. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Moto Roma Go Go 50 fail its MOT on most?

Brakes: 9.6% of Moto Roma Go Go 50 MOT tests failed on it, then steering & suspension (8.0%).

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%).

MOTO ROMA GO GO 50 70.8% pass · 791 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.