Royal Alloy GP 300 S MOT pass rate and common failures
Royal Alloy GP 300 S motorcycles pass the MOT 92.35% of the time, measured across 340 tests in the DVSA record. A further 2.06% 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 36.8% of failed tests on this model.
- Then check does not conform to the specified requirements and not working, the next two most common reasons.
- The most common advisory is excessively stiff or notchy (5.6% of all tests) - not a failure, but money you will spend sooner or later.
- Average recorded mileage at test is 4,756 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 | 92.35% | 340 |
Why the Royal Alloy GP 300 S 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 | 36.8% | 7 | |
| 2 | Does not conform to the specified requirements | 15.8% | 3 | |
| 3 | Not working | 15.8% | 3 | |
| 4 | Rough when rotated | 15.8% | 3 | |
| 5 | Too high | 15.8% | 3 | |
| 6 | Too low | 10.5% | 2 | |
| 7 | Tread depth is below minimum requirements of 1.0mm | 10.5% | 2 | |
| 8 | Flashing more than 120 times a minute | 5.3% | 1 | |
| 9 | Has a tear caused by separation or partial failure of its structure | 5.3% | 1 | |
| 10 | Has abnormal movement of levers indicating excessive wear or maladjustment | 5.3% | 1 |
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 | 5.6% | 19 | |
| 2 | Tread depth is below minimum requirements of 1.0mm | 3.8% | 13 | |
| 3 | Noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition | 3.5% | 12 | |
| 4 | Has excessive play | 1.2% | 4 | |
| 5 | Has a major leak of exhaust gases | 0.9% | 3 | |
| 6 | Excessively binding | 0.6% | 2 | |
| 7 | Is so short that the brake cannot be readily applied | 0.6% | 2 | |
| 8 | Seriously damaged | 0.6% | 2 | |
| 9 | System insecure | 0.6% | 2 | |
| 10 | Tread not clearly visible | 0.6% | 2 |
Royal Alloy GP 300 S for sale
No Royal Alloy GP 300 S 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 | |
|---|---|---|---|---|
| Piaggio VESPA GTS · 240-300cc | 4,305 | 92.15% | 9,875 | |
| Honda CRF 220-250cc · 220-250cc | 2,452 | 89.76% | 7,549 | |
| Royal Enfield METEOR 350 · 349cc | 2,133 | 93.95% | 4,543 | |
| Honda NSS 250-297cc · 250-297cc | 1,397 | 90.34% | 17,407 | |
| Honda CRF 300 LA-M · 286cc | 1,297 | 88.43% | 3,963 | |
| BMW G310 · 313cc | 1,129 | 90.79% | 7,243 |
Source: DVSA MOT testing data, 2025 · updated Aug 2026 · licence and method