Gilera SKP vs Piaggio NRG

The Gilera SKP passes its MOT first time more often than the Piaggio NRG: 67.0% vs 65.5%, a 1.5-point lead.

MOT reliability, side by side

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

Metric	Gilera SKP	Piaggio NRG
First-time pass rate	67.0%	65.5%
Outright fail rate	25.6%	27.4%
Vs comparable bikes (age & mileage adjusted)	-6.0 pts	-6.0 pts
Engine size	49cc	49cc
Rank among all models	#4907 of 5428	#4992 of 5428
Median miles at test	8,882	9,874
MOT tests analysed	1,745	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	Gilera SKP	Piaggio NRG
Lights & signalling	17.0%	15.0%
Steering & suspension	13.1%	15.5%
Brakes	10.5%	10.2%
Tyres & wheels	3.7%	4.7%
Fuel & exhaust	3.6%	3.8%
Structure & body	3.7%	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	Gilera SKP	Piaggio NRG
2005	65.4%	66.2%
2006	66.8%	64.7%
2007	63.4%	63.9%
2008	61.2%	65.2%
2009	62.0%	62.2%
2010	77.8%	63.2%
2011	67.3%	63.9%

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	Gilera SKP	Piaggio NRG
0k-10k miles	71.6%	71.3%
10k-20k miles	60.4%	60.6%
20k-30k miles	57.9%	55.7%

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

Gilera SKP vs Piaggio NRG FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Gilera SKP or the Piaggio NRG?

The Gilera SKP passes its MOT first time more often than the Piaggio NRG: 67.0% vs 65.5%, a 1.5-point lead. Adjusted for age, mileage and test class the two are level (-6.0 vs -6.0 points against comparable bikes), so the raw gap is mostly down to how old and how used each fleet is. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Gilera SKP fail its MOT on most?

Lights & signalling: 17.0% of Gilera SKP MOT tests failed on it, then steering & suspension (13.1%).

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%).

Which holds up better at high mileage, the Gilera SKP or the Piaggio NRG?

At 20k-30k miles the Gilera SKP passes first time more often: 57.9% for the Gilera SKP vs 55.7% for the Piaggio NRG.

GILERA SKP 67.0% pass · 1,745 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.