Royal Alloy GP 125 AC MOT pass rate and common failures
Royal Alloy GP 125 AC motorcycles pass the MOT 85.33% of the time, measured across 300 tests in the DVSA record. A further 4% 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 excessively stiff or notchy - it accounts for 28.1% of failed tests on this model.
- Then check excessively binding and does not conform to the specified requirements, the next two most common reasons.
- The most common advisory is excessively stiff or notchy (7.3% of all tests) - not a failure, but money you will spend sooner or later.
- Average recorded mileage at test is 4,123 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 | 84.8% | 204 | |
| 6-10 years | 86.46% | 96 |
Why the Royal Alloy GP 125 AC 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 | Excessively stiff or notchy | 28.1% | 9 | |
| 2 | Excessively binding | 21.9% | 7 | |
| 3 | Does not conform to the specified requirements | 15.6% | 5 | |
| 4 | Has a major leak of exhaust gases | 15.6% | 5 | |
| 5 | Too low | 15.6% | 5 | |
| 6 | Too high | 12.5% | 4 | |
| 7 | Tread depth is below minimum requirements of 1.0mm | 12.5% | 4 | |
| 8 | Insecure | 9.4% | 3 | |
| 9 | Not working on main beam | 9.4% | 3 | |
| 10 | Has excessive play | 6.3% | 2 |
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 stiff or notchy | 7.3% | 22 | |
| 2 | Noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition | 5.3% | 16 | |
| 3 | Tread depth is below minimum requirements of 1.0mm | 5.3% | 16 | |
| 4 | Excessively binding | 3.7% | 11 | |
| 5 | Has a major leak of exhaust gases | 1.7% | 5 | |
| 6 | Has excessive wear or free play | 1.7% | 5 | |
| 7 | Has excessive play | 1.3% | 4 | |
| 8 | Indicates excessive fluctuation of brake effort | 1.3% | 4 | |
| 9 | In such a condition that it is seriously weakened | 1% | 3 | |
| 10 | Tread not clearly visible | 1% | 3 |
Royal Alloy GP 125 AC for sale
No Royal Alloy GP 125 AC in stock at the moment - 83 other Royal Alloy 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