Ariel Leader vs Piaggio PX 200 E

The Ariel Leader passes its MOT first time more often than the Piaggio PX 200 E: 92.7% vs 86.5%, a 6.2-point lead.

MOT reliability, side by side

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

Metric	Ariel Leader	Piaggio PX 200 E
First-time pass rate	92.7%	86.5%
Outright fail rate	3.0%	7.2%
Engine size	250cc	198cc
Rank among all models	#344 of 5428	#2052 of 5428
Median miles at test	15,045	11,382
MOT tests analysed	1,135	28,415
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.

What fails, side by side

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

Component	Ariel Leader	Piaggio PX 200 E
Lights & signalling	0.9%	4.3%
Brakes	1.4%	1.5%
Steering & suspension	1.1%	1.7%
Tyres & wheels	0.5%	1.6%
Fuel & exhaust	0.3%	0.3%
Structure & body	0.1%	0.3%
Drive system	0.2%	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	Ariel Leader	Piaggio PX 200 E
2010	94.4%	83.4%
2011	92.4%	86.3%
2012	94.6%	85.3%
2013	92.9%	85.9%
2014	91.3%	85.1%
2015	94.0%	85.9%
2016	97.1%	86.1%
2017	93.7%	87.7%

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	Ariel Leader	Piaggio PX 200 E
0k-10k miles	93.3%	88.0%
10k-20k miles	91.7%	85.9%
20k-30k miles	92.1%	84.7%
30k-40k miles	88.3%	84.2%
40k-50k miles	95.5%	87.8%
50k-60k miles	92.7%	86.1%

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

Ariel Leader vs Piaggio PX 200 E FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Ariel Leader or the Piaggio PX 200 E?

The Ariel Leader passes its MOT first time more often than the Piaggio PX 200 E: 92.7% vs 86.5%, a 6.2-point lead. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Ariel Leader fail its MOT on most?

Brakes: 1.4% of Ariel Leader MOT tests failed on it, then steering & suspension (1.1%).

What does the Piaggio PX 200 E fail its MOT on most?

Lights & signalling: 4.3% of Piaggio PX 200 E MOT tests failed on it, then steering & suspension (1.7%).

Which holds up better at high mileage, the Ariel Leader or the Piaggio PX 200 E?

At 50k-60k miles the Ariel Leader passes first time more often: 92.7% for the Ariel Leader vs 86.1% for the Piaggio PX 200 E.

ARIEL LEADER 92.7% pass · 1,135 tests PIAGGIO PX 200 E 86.5% pass · 28.4k tests

See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.