Sinnis ZS 125-86 TERRAIN MOT pass rate and common failures
Sinnis ZS 125-86 TERRAIN motorcycles pass the MOT 68.76% of the time, measured across 461 tests in the DVSA record. A further 7.59% 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 24.8% of failed tests on this model.
- Then check excessively binding and tread depth is below minimum requirements of 1.0mm, the next two most common reasons.
- The most common advisory is excessively binding (10% of all tests) - not a failure, but money you will spend sooner or later.
- Average recorded mileage at test is 11,890 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 | 69.62% | 237 | |
| 6-10 years | 67.86% | 224 |
Why the Sinnis ZS 125-86 TERRAIN 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 | 24.8% | 27 | |
| 2 | Excessively binding | 19.3% | 21 | |
| 3 | Tread depth is below minimum requirements of 1.0mm | 17.4% | 19 | |
| 4 | Excessively loose | 16.5% | 18 | |
| 5 | Less than 1.0 mm thick | 15.6% | 17 | |
| 6 | Has a serious fluid leak | 12.8% | 14 | |
| 7 | Does not illuminate simultaneously with the position lamp(s) | 11.9% | 13 | |
| 8 | Insecure | 11.9% | 13 | |
| 9 | Missing | 11% | 12 | |
| 10 | Inoperative in the case of a single lamp or all lamps | 9.2% | 10 |
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 | Excessively binding | 10% | 46 | |
| 2 | Tread depth is below minimum requirements of 1.0mm | 9.8% | 45 | |
| 3 | Has a serious fluid leak | 6.1% | 28 | |
| 4 | Less than 1.0 mm thick | 5.9% | 27 | |
| 5 | Excessively loose | 4.6% | 21 | |
| 6 | Noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition | 3.7% | 17 | |
| 7 | Worn to excess | 3.7% | 17 | |
| 8 | In such a condition that it is seriously weakened | 3.3% | 15 | |
| 9 | Tread not clearly visible | 2.8% | 13 | |
| 10 | Excessively stiff or notchy | 2.6% | 12 |
Sinnis ZS 125-86 TERRAIN for sale
No Sinnis ZS 125-86 TERRAIN in stock at the moment - 0 other Sinnis 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