Huatian HT 50 QT-6 vs Piaggio Zip

The Piaggio Zip passes its MOT first time more often than the Huatian HT 50 QT-6: 71.3% vs 50.3%, a 21.0-point lead.

MOT reliability, side by side

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

Metric	Huatian HT 50 QT-6	Piaggio Zip
First-time pass rate	50.3%	71.3%
Outright fail rate	40.2%	20.4%
Vs comparable bikes (age & mileage adjusted)	-23.8 pts	-1.0 pts
Engine size	50cc	49cc
Median miles at test	5,639	8,882
MOT tests analysed	179	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	Huatian HT 50 QT-6	Piaggio Zip
2011	44.2%	69.7%
2012	57.5%	69.1%
2013	63.6%	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	Huatian HT 50 QT-6	Piaggio Zip
0k-10k miles	53.2%	75.2%
10k-20k miles	39.5%	66.7%

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

HUATIAN HT 50 QT-6 50.3% pass · 179 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.