Pass rate by mileage
A low-mileage ZR50 passes first time 73.6% of the time; by 20k that's 54.4%.
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 ZR50
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| lighting and signalling |
|
107 | 39.3 |
| steering and suspension |
|
51 | 18.8 |
| brakes |
|
38 | 14 |
| tyres and wheels |
|
17 | 6.2 |
| drive system |
|
17 | 6.2 |
| lamps and reflectors |
|
14 | 5.1 |
| body and structure |
|
14 | 5.1 |
| fuel and exhaust |
|
7 | 2.6 |
| driving controls |
|
4 | 1.5 |
| tyres |
|
3 | 1.1 |
Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.
How rivals compare
On first-time pass rate the ZR50 beats 2 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 ZR50.
Pass rate by registration year
Best year to buy used: 1982 (73.3% pass). Weakest: 1982 (73.3%).
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.