Data as of: DVSA MOT results to 2025
KTM Duke vs Triumph Street Triple R
The Triumph Street Triple R passes its MOT first time more often than the KTM Duke: 87.7% vs 79.7%, a 8.0-point lead.
MOT reliability, side by side
| Metric | KTM Duke | Triumph Street Triple R |
|---|---|---|
| First-time pass rate | 79.7% | 87.7% |
| Outright fail rate | 11.7% | 6.0% |
| Vs comparable bikes (age & mileage adjusted) | -3.5 pts | +1.1 pts |
| Engine size | 625cc | 675cc |
| Rank among all models | #3649 of 5428 | #1695 of 5428 |
| Median miles at test | 10,208 | 10,588 |
| MOT tests analysed | 1,619 | 20,614 |
| Most common failure | lighting and signalling | lamps and reflectors |
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.
What fails, side by side
| Component | KTM Duke | Triumph Street Triple R |
|---|---|---|
| Lights & signalling | 7.4% | 2.7% |
| Brakes | 3.2% | 1.6% |
| Steering & suspension | 3.3% | 1.0% |
| Tyres & wheels | 2.5% | 1.2% |
| Structure & body | 1.4% | 0.8% |
| Drive system | 0.9% | 0.1% |
| Fuel & exhaust | 0.6% | 0.1% |
A test that fails on two components counts once in each. Component links go to the bikes most likely to fail on it.
Pass rate by test year
| Test year | KTM Duke | Triumph Street Triple R |
|---|---|---|
| 2018 | 78.2% | 87.9% |
| 2019 | 79.7% | 87.9% |
| 2020 | 85.2% | 87.5% |
| 2021 | 75.3% | 87.8% |
| 2022 | 77.8% | 85.9% |
| 2023 | 77.2% | 87.0% |
| 2024 | 81.8% | 88.0% |
| 2025 | 76.5% | 89.8% |
Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.
Pass rate by mileage
| Mileage | KTM Duke | Triumph Street Triple R |
|---|---|---|
| 0k-10k miles | 83.8% | 91.0% |
| 10k-20k miles | 76.2% | 86.5% |
| 20k-30k miles | 71.8% | 82.0% |
Bands with fewer than 30 tests for either bike are left out.
KTM Duke vs Triumph Street Triple R FAQ
Which is more reliable, the KTM Duke or the Triumph Street Triple R?
The Triumph Street Triple R passes its MOT first time more often than the KTM Duke: 87.7% vs 79.7%, a 8.0-point lead. Adjusted for age, mileage and test class, the Triumph Street Triple R still comes out ahead: -3.5 points vs comparable bikes for the KTM Duke, +1.1 for the Triumph Street Triple R. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the KTM Duke fail its MOT on most?
Lights & signalling: 7.4% of KTM Duke MOT tests failed on it, then steering & suspension (3.3%).
What does the Triumph Street Triple R fail its MOT on most?
Lights & signalling: 2.7% of Triumph Street Triple R MOT tests failed on it, then brakes (1.6%).
Which holds up better at high mileage, the KTM Duke or the Triumph Street Triple R?
At 20k-30k miles the Triumph Street Triple R passes first time more often: 71.8% for the KTM Duke vs 82.0% for the Triumph Street Triple R.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.