Jincheng JC vs Piaggio Zip

The Jincheng JC passes its MOT first time more often than the Piaggio Zip: 81.4% vs 71.3%, a 10.1-point lead.

MOT reliability, side by side

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

Metric	Jincheng JC	Piaggio Zip
First-time pass rate	81.4%	71.3%
Outright fail rate	8.1%	20.4%
Vs comparable bikes (age & mileage adjusted)	+1.9 pts	-1.0 pts
Engine size	49cc	49cc
Rank among all models	#3291 of 5428	#4631 of 5428
Median miles at test	834	8,882
MOT tests analysed	247	78,993
Most common failure	lamps and reflectors	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	Jincheng JC	Piaggio Zip
2017	86.7%	71.7%
2018	90.0%	72.9%
2020	87.5%	73.1%
2022	78.1%	74.5%
2025	83.3%	76.2%

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

JINCHENG JC 81.4% pass · 247 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.