Data as of: DVSA MOT results to 2025
KTM 450 Exc vs Suzuki GS500
The KTM 450 Exc and Suzuki GS500 have an identical 76.4% first-time MOT pass rate.
MOT reliability, side by side
| Metric | KTM 450 Exc | Suzuki GS500 |
|---|---|---|
| First-time pass rate | 76.4% | 76.4% |
| Outright fail rate | 12.7% | 15.0% |
| Vs comparable bikes (age & mileage adjusted) | -11.1 pts | -7.1 pts |
| Engine size | 450cc | 487cc |
| Rank among all models | #4137 of 5428 | #4137 of 5428 |
| Median miles at test | 3,298 | 21,676 |
| MOT tests analysed | 7,579 | 44,924 |
| Most common failure | lighting and signalling | brakes |
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 450 Exc | Suzuki GS500 |
|---|---|---|
| Lights & signalling | 8.3% | 5.5% |
| Steering & suspension | 5.7% | 6.6% |
| Brakes | 2.4% | 6.3% |
| Tyres & wheels | 2.9% | 3.4% |
| Drive system | 0.8% | 2.0% |
| Structure & body | 0.5% | 1.1% |
| Fuel & exhaust | 0.3% | 0.7% |
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 450 Exc | Suzuki GS500 |
|---|---|---|
| 2018 | 77.6% | 75.8% |
| 2019 | 81.2% | 79.4% |
| 2020 | 82.0% | 76.9% |
| 2021 | 81.1% | 78.9% |
| 2022 | 78.0% | 80.6% |
| 2023 | 79.7% | 78.2% |
| 2024 | 83.2% | 79.7% |
| 2025 | 84.3% | 81.5% |
Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.
Pass rate by mileage
| Mileage | KTM 450 Exc | Suzuki GS500 |
|---|---|---|
| 0k-10k miles | 77.5% | 86.4% |
| 10k-20k miles | 82.2% | 78.9% |
Bands with fewer than 30 tests for either bike are left out.
KTM 450 Exc vs Suzuki GS500 FAQ
Which is more reliable, the KTM 450 Exc or the Suzuki GS500?
The KTM 450 Exc and Suzuki GS500 have an identical 76.4% first-time MOT pass rate. Adjusted for age, mileage and test class, the Suzuki GS500 still comes out ahead: -11.1 points vs comparable bikes for the KTM 450 Exc, -7.1 for the Suzuki GS500. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the KTM 450 Exc fail its MOT on most?
Lights & signalling: 8.3% of KTM 450 Exc MOT tests failed on it, then steering & suspension (5.7%).
What does the Suzuki GS500 fail its MOT on most?
Steering & suspension: 6.6% of Suzuki GS500 MOT tests failed on it, then brakes (6.3%).
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.