Yamaha XT 499-660cc MOT pass rate and common failures
Yamaha XT 499-660cc motorcycles pass the MOT 85.32% of the time, measured across 327 tests in the DVSA record. A further 5.81% passed only after a defect was put right at the test station.
Calculated from DVSA records for Yamaha XT, 499-660cc.
What to check before the MOT
Built from this model's own failure record, not general advice.
- Start with not working - it accounts for 55.2% of failed tests on this model.
- Then check has a serious fluid leak and missing, the next two most common reasons.
- Age matters here: 88.24% of 6-10 year old examples pass, against 81.32% at 16+ years - a gap of 6.9 points.
- The most common advisory is noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8% of all tests) - not a failure, but money you will spend sooner or later.
- Average recorded mileage at test is 16,069 miles, which is the number to compare any advert against.
Pass rate by age
A single pass rate hides the most useful thing in this data: how the same model behaves at three years old and at fifteen.
| Age at test | Pass rate | Tests | |
|---|---|---|---|
| 6-10 years | 88.24% | 136 | |
| 11-15 years | 85% | 100 | |
| 16+ years | 81.32% | 91 |
Why the Yamaha XT 499-660cc fails
Share of failed tests on this model where the item was recorded. One test can fail on several items, so the column does not add up to 100%.
| # | Item | Of failures | Tests | |
|---|---|---|---|---|
| 1 | Not working | 55.2% | 16 | |
| 2 | Has a serious fluid leak | 27.6% | 8 | |
| 3 | Missing | 24.1% | 7 | |
| 4 | Does not illuminate by the operation of both brake controls | 10.3% | 3 | |
| 5 | Excessively loose | 10.3% | 3 | |
| 6 | Has excessive play | 10.3% | 3 | |
| 7 | Inoperative in the case of a single lamp or all lamps | 10.3% | 3 | |
| 8 | Not working on dipped beam | 10.3% | 3 | |
| 9 | Rough when rotated | 10.3% | 3 | |
| 10 | Silencer likely to become detached | 10.3% | 3 |
Most common advisories
Not a failure and not a legal requirement to fix - but an advisory that repeats year after year is money the next owner spends.
| # | Item | Of all tests | Tests | |
|---|---|---|---|---|
| 1 | Noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition | 8% | 26 | |
| 2 | Has a serious fluid leak | 2.8% | 9 | |
| 3 | Worn to excess | 2.8% | 9 | |
| 4 | Less than 1.0 mm thick | 2.4% | 8 | |
| 5 | Has excessive play | 2.1% | 7 | |
| 6 | Tread depth is below minimum requirements of 1.0mm | 1.5% | 5 | |
| 7 | Excessively binding | 1.2% | 4 | |
| 8 | Excessively loose | 1.2% | 4 | |
| 9 | Indicates excessive fluctuation of brake effort | 1.2% | 4 | |
| 10 | Inscription illegible | 1.2% | 4 |
Yamaha XT 499-660cc for sale
No Yamaha XT 499-660cc in stock at the moment - 86 other Yamaha bikes are advertised.
Similar bikes compared
Models of comparable capacity, so the comparison means something.
| Model | Tests | Pass rate | Avg mileage | |
|---|---|---|---|---|
| Honda CB 397-750cc · 397-750cc | 5,400 | 89.76% | 19,444 | |
| Honda CBR600F · 599cc | 4,914 | 85.61% | 30,486 | |
| Suzuki GSF600 · 600cc | 4,890 | 80% | 29,308 | |
| Kawasaki ZX-6R · 599-636cc | 4,713 | 81.54% | 26,085 | |
| Royal Enfield INTERCEPTOR INT 650 · 649cc | 4,016 | 91.24% | 5,914 | |
| Suzuki SV650 · 646cc | 3,834 | 80.99% | 27,644 |
Source: DVSA MOT testing data, 2025 · updated Aug 2026 · licence and method