Pass rate over time
The 390 DUKE 18's first-time pass rate has risen 4.4 points since 2021, 86.2% to 90.6%.
What fails on a 390 DUKE 18
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| lamps and reflectors |
|
26 | 28.9 | 1.2× |
| brakes |
|
20 | 22.2 | 0.4× |
| structure and attachments |
|
16 | 17.8 | 1.8× |
| tyres |
|
11 | 12.2 | 1.6× |
| suspension |
|
7 | 7.8 | 0.9× |
| Identification of the vehicle |
|
4 | 4.4 | 1.7× |
| steering |
|
3 | 3.3 | 0.7× |
| audible warning (Horn) |
|
2 | 2.2 | 1.1× |
| wheels |
|
1 | 1.1 | 1.6× |
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 DUKE 18 beats 2 of its 2 closest rivals (HONDA CB400, HONDA CB400N).
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 DUKE 18.
Pass rate by registration year
Best year to buy used: 2019 (89.8% pass). Weakest: 2018 (89.4%).
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 DUKE 18 FAQ
Is the KTM 390 DUKE 18 reliable?
The KTM 390 DUKE 18 is more reliable than average for its class: 89.5% of its 1,030 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #1111 of 5426 models.
What does a 390 DUKE 18 fail its MOT on most?
lamps and reflectors — 29% of all defects recorded against failed 390 DUKE 18 tests.