Mutt MONGREL 125 MOT pass rate and common failures
Mutt MONGREL 125 motorcycles pass the MOT 67.73% of the time, measured across 753 tests in the DVSA record. A further 11.29% passed only after a defect was put right at the test station.
What to check before the MOT
Built from this model's own failure record, not general advice.
- Start with not working - it accounts for 51.3% of failed tests on this model.
- Then check missing and insecure, the next two most common reasons.
- Age matters here: 72.07% of 3-5 year old examples pass, against 63.8% at 6-10 years - a gap of 8.3 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 (7.2% of all tests) - not a failure, but money you will spend sooner or later.
- Average recorded mileage at test is 5,661 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 | |
|---|---|---|---|
| 3-5 years | 72.07% | 358 | |
| 6-10 years | 63.8% | 395 |
Why the Mutt MONGREL 125 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 | 51.3% | 81 | |
| 2 | Missing | 36.7% | 58 | |
| 3 | Insecure | 18.4% | 29 | |
| 4 | The less effective brake control does not achieve an efficiency of 25% | 14.6% | 23 | |
| 5 | Too high | 14.6% | 23 | |
| 6 | Too low | 12.7% | 20 | |
| 7 | Excessively binding | 11.4% | 18 | |
| 8 | Excessively loose | 11.4% | 18 | |
| 9 | Not working on dipped beam | 11.4% | 18 | |
| 10 | Less than 1.0 mm thick | 8.2% | 13 |
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 | 7.2% | 54 | |
| 2 | Worn to excess | 3.9% | 29 | |
| 3 | Less than 1.0 mm thick | 3.5% | 26 | |
| 4 | Excessively loose | 3.2% | 24 | |
| 5 | Excessively binding | 3.1% | 23 | |
| 6 | Indicates excessive fluctuation of brake effort | 2.1% | 16 | |
| 7 | Excessively stiff or notchy | 2% | 15 | |
| 8 | Has excessive play | 2% | 15 | |
| 9 | Pin or bush excessively worn | 2% | 15 | |
| 10 | Inscription illegible | 1.9% | 14 |
Mutt MONGREL 125 for sale
No Mutt MONGREL 125 in stock at the moment - 0 other Mutt bikes are advertised.
Similar bikes compared
Models of comparable capacity, so the comparison means something.
| Model | Tests | Pass rate | Avg mileage | |
|---|---|---|---|---|
| Yamaha GPD125-A NMAX 125 · 125cc | 8,762 | 80.8% | 45,039 | |
| Piaggio VESPA 79-210cc · 79-210cc | 8,363 | 85.42% | 11,710 | |
| Honda WW · 125cc | 7,252 | 80.32% | 40,134 | |
| Honda WW 125 A-M · 125cc | 5,011 | 84.06% | 29,846 | |
| Honda GLR · 125cc | 4,737 | 79.99% | 14,642 | |
| Honda CBF 100-125cc · 100-125cc | 3,204 | 77% | 15,203 |
Source: DVSA MOT testing data, 2025 · updated Aug 2026 · licence and method