Generic Xor vs Piaggio NRG

The Generic Xor passes its MOT first time more often than the Piaggio NRG: 66.7% vs 65.5%, a 1.2-point lead.

MOT reliability, side by side

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

Metric	Generic Xor	Piaggio NRG
First-time pass rate	66.7%	65.5%
Outright fail rate	24.0%	27.4%
Vs comparable bikes (age & mileage adjusted)	-5.5 pts	-6.0 pts
Engine size	50cc	49cc
Rank among all models	#4925 of 5428	#4992 of 5428
Median miles at test	8,332	9,874
MOT tests analysed	1,090	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	Generic Xor	Piaggio NRG
Steering & suspension	12.8%	15.5%
Lights & signalling	12.7%	15.0%
Brakes	9.0%	10.2%
Tyres & wheels	5.8%	4.7%
Fuel & exhaust	3.0%	3.8%
Structure & body	1.8%	2.5%
Drive system	0.2%	0.0%

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	Generic Xor	Piaggio NRG
2013	64.8%	64.1%
2014	68.3%	67.4%
2015	68.0%	68.8%
2016	64.8%	68.0%
2017	61.9%	72.0%
2018	65.1%	69.2%
2019	77.4%	68.0%
2021	75.0%	72.9%

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	Generic Xor	Piaggio NRG
0k-10k miles	69.9%	71.3%
10k-20k miles	62.3%	60.6%
20k-30k miles	55.7%	55.7%

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

Generic Xor vs Piaggio NRG FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Generic Xor or the Piaggio NRG?

The Generic Xor passes its MOT first time more often than the Piaggio NRG: 66.7% vs 65.5%, a 1.2-point lead. Adjusted for age, mileage and test class the two are level (-5.5 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 Generic Xor fail its MOT on most?

Steering & suspension: 12.8% of Generic Xor MOT tests failed on it, then lights & signalling (12.7%).

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 Generic Xor or the Piaggio NRG?

They are level: at 20k-30k miles the Generic Xor passes 55.7% first time and the Piaggio NRG 55.7%.

GENERIC XOR 66.7% pass · 1,090 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.