Pass rate over time
The 390's first-time pass rate has risen 3.5 points since 2017, 83.3% to 86.8%.
Pass rate by mileage
A low-mileage 390 passes first time 87.8% of the time; by 20k that's 78.9%.
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 390
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| lamps and reflectors |
|
130 | 26.7 | 1.7× |
| structure and attachments |
|
103 | 21.1 | 3.0× |
| brakes |
|
96 | 19.7 | 0.5× |
| tyres |
|
48 | 9.9 | 1.9× |
| suspension |
|
42 | 8.6 | 1.4× |
| lighting and signalling |
|
18 | 3.7 | 0.1× |
| Identification of the vehicle |
|
18 | 3.7 | 2.1× |
| steering |
|
16 | 3.3 | 1.0× |
| reg plates and vin |
|
8 | 1.6 | 0.3× |
| audible warning (Horn) |
|
8 | 1.6 | 1.2× |
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 390 beats 4 of its 4 closest rivals (SUZUKI AN400, SUZUKI DR-Z400S, YAMAHA RD350).
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 390.
Pass rate by registration year
Best year to buy used: 2017 (92.8% pass). Weakest: 2013 (83.6%).
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.
KTM 390 FAQ
Is the KTM 390 reliable?
The KTM 390 is about average for its class: 86.4% of its 3,737 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #2089 of 5426 models.
What does a 390 fail its MOT on most?
lamps and reflectors — 27% of all defects recorded against failed 390 tests.
What is the best year of 390 to buy used?
By first-time pass rate, 2017-registered examples do best (92.8%) and 2013 worst (83.6%). Condition and history still trump the year.
How many miles will a 390 last?
The median 390 shows 5,598 miles at test, and examples around 20k miles still pass 78.9% of the time — mileage alone rarely kills one.