Cpi Popcorn vs Piaggio Zip

The Piaggio Zip passes its MOT first time more often than the Cpi Popcorn: 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 Popcorn	Piaggio Zip
First-time pass rate	63.5%	71.3%
Outright fail rate	26.0%	20.4%
Vs comparable bikes (age & mileage adjusted)	-9.5 pts	-1.0 pts
Engine size	49cc	49cc
Rank among all models	#5086 of 5428	#4631 of 5428
Median miles at test	8,016	8,882
MOT tests analysed	427	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 Popcorn	Piaggio Zip
2006	63.3%	73.7%
2007	61.4%	71.0%
2008	65.9%	72.4%
2009	61.4%	70.0%
2010	60.9%	70.8%
2011	65.9%	69.7%

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	Cpi Popcorn	Piaggio Zip
0k-10k miles	66.7%	75.2%
10k-20k miles	55.6%	66.7%

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

CPI POPCORN 63.5% pass · 427 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.