Cpi Aragon 50 vs Piaggio Zip

The Piaggio Zip passes its MOT first time more often than the Cpi Aragon 50: 71.3% vs 63.5%, a 7.8-point lead.

MOT reliability, side by side

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

Metric	Cpi Aragon 50	Piaggio Zip
First-time pass rate	63.5%	71.3%
Outright fail rate	26.7%	20.4%
Vs comparable bikes (age & mileage adjusted)	-10.1 pts	-1.0 pts
Engine size	49cc	49cc
Rank among all models	#5086 of 5428	#4631 of 5428
Median miles at test	5,172	8,882
MOT tests analysed	277	78,993
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.

Pass rate by test year

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

Test year	Cpi Aragon 50	Piaggio Zip
2011	60.3%	69.7%
2012	55.8%	69.1%
2013	59.4%	69.7%
2015	62.9%	69.8%

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

CPI ARAGON 50 63.5% pass · 277 tests PIAGGIO ZIP 71.3% pass · 79.0k tests

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