Data as of: DVSA MOT results to 2025
Kawasaki Z900 vs Aprilia Tuono
The Aprilia Tuono passes its MOT first time more often than the Kawasaki Z900: 88.4% vs 86.9%, a 1.5-point lead.
MOT reliability, side by side
| Metric | Kawasaki Z900 | Aprilia Tuono |
|---|---|---|
| First-time pass rate | 86.9% | 88.4% |
| Outright fail rate | 5.9% | 5.5% |
| Vs comparable bikes (age & mileage adjusted) | +2.5 pts | +2.3 pts |
| Engine size | 903cc | 998cc |
| Rank among all models | #1937 of 5428 | #1478 of 5428 |
| Median miles at test | 27,446 | 11,489 |
| MOT tests analysed | 4,100 | 34,724 |
| 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 | Kawasaki Z900 | Aprilia Tuono |
|---|---|---|
| Lights & signalling | 3.4% | 2.5% |
| Brakes | 1.4% | 1.5% |
| Steering & suspension | 1.7% | 1.2% |
| Tyres & wheels | 1.0% | 1.1% |
| Structure & body | 0.3% | 0.6% |
| Drive system | 0.5% | 0.3% |
| Fuel & exhaust | 0.4% | 0.2% |
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 | Kawasaki Z900 | Aprilia Tuono |
|---|---|---|
| 2015 | 85.8% | 87.5% |
| 2016 | 89.4% | 88.1% |
| 2017 | 85.7% | 87.3% |
| 2018 | 92.7% | 88.7% |
| 2019 | 93.3% | 89.4% |
| 2020 | 92.7% | 90.5% |
| 2021 | 95.6% | 90.2% |
| 2022 | 90.0% | 89.9% |
Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.
Pass rate by mileage
| Mileage | Kawasaki Z900 | Aprilia Tuono |
|---|---|---|
| 0k-10k miles | 86.8% | 90.7% |
| 10k-20k miles | 87.7% | 87.2% |
| 20k-30k miles | 87.2% | 86.2% |
| 30k-40k miles | 86.3% | 84.6% |
| 40k-50k miles | 88.1% | 82.1% |
| 50k-60k miles | 86.1% | 85.7% |
Bands with fewer than 30 tests for either bike are left out.
Kawasaki Z900 vs Aprilia Tuono FAQ
Which is more reliable, the Kawasaki Z900 or the Aprilia Tuono?
The Aprilia Tuono passes its MOT first time more often than the Kawasaki Z900: 88.4% vs 86.9%, a 1.5-point lead. Adjusted for age, mileage and test class the two are level (+2.5 vs +2.3 points against comparable bikes), so the raw gap is mostly down to how old and how used each fleet is. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the Kawasaki Z900 fail its MOT on most?
Lights & signalling: 3.4% of Kawasaki Z900 MOT tests failed on it, then steering & suspension (1.7%).
What does the Aprilia Tuono fail its MOT on most?
Lights & signalling: 2.5% of Aprilia Tuono MOT tests failed on it, then brakes (1.5%).
Which holds up better at high mileage, the Kawasaki Z900 or the Aprilia Tuono?
They are level: at 50k-60k miles the Kawasaki Z900 passes 86.1% first time and the Aprilia Tuono 85.7%.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.