Pass rate over time
The ZX's first-time pass rate has held steady since 2005 (78.8% → 78.1%).
Pass rate by mileage
A low-mileage ZX passes first time 80.8% of the time; by 30k that's 73.3%.
First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.
What fails on a ZX
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| lighting and signalling |
|
295 | 38.9 | 2.0× |
| steering and suspension |
|
132 | 17.4 | 1.7× |
| tyres and wheels |
|
103 | 13.6 | 2.1× |
| brakes |
|
102 | 13.5 | 0.9× |
| fuel and exhaust |
|
67 | 8.8 | 3.8× |
| body and structure |
|
22 | 2.9 | 1.9× |
| lamps and reflectors |
|
16 | 2.1 | 0.2× |
| reg plates and vin |
|
13 | 1.7 | 1.0× |
| tyres |
|
4 | 0.5 | 0.3× |
| driving controls |
|
4 | 0.5 | 0.8× |
Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.
How rivals compare
On first-time pass rate the ZX beats 4 of its 4 closest rivals (PEUGEOT SPEEDFIGHT, PIAGGIO ZIP, PIAGGIO NRG).
Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the ZX.
Pass rate by registration year
Best year to buy used: 2001 (78.3% pass). Weakest: 2006 (71.7%).
First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.
KYMCO ZX FAQ
Is the KYMCO ZX reliable?
The KYMCO ZX is about average for its class: 75.1% of its 2,191 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4289 of 5426 models.
What does a ZX fail its MOT on most?
lighting and signalling — 39% of all defects recorded against failed ZX tests.
What is the best year of ZX to buy used?
By first-time pass rate, 2001-registered examples do best (78.3%) and 2006 worst (71.7%). Condition and history still trump the year.
How many miles will a ZX last?
The median ZX shows 10,944 miles at test, and examples around 30k miles still pass 73.3% of the time — mileage alone rarely kills one.