ROYAL ALLOY GP 125 AC
The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.
“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.
Pass rate over time
The GP 125 AC's first-time pass rate has fallen 3.0 points since 2021, 88.6% to 85.6%.
What fails on a GP 125 AC
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| brakes |
|
54 | 28.3 | 0.9× |
| lamps and reflectors |
|
43 | 22.5 | 1.9× |
| steering |
|
39 | 20.4 | 9.0× |
| tyres |
|
17 | 8.9 | 2.3× |
| suspension |
|
16 | 8.4 | 2.2× |
| structure and attachments |
|
14 | 7.3 | 1.7× |
| Identification of the vehicle |
|
8 | 4.2 | 3.6× |
Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.
How rivals compare
On first-time pass rate the GP 125 AC beats 4 of its 4 closest rivals (PIAGGIO VESPA, HONDA PCX 125, HONDA Vision 110).
Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the GP 125 AC.
Compare with any bike
More ROYAL ALLOY models
Pass rate by registration year
Best year to buy used: 2020 (90.3% pass). Weakest: 2019 (85.4%).
First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.
ROYAL ALLOY GP 125 AC FAQ
Is the ROYAL ALLOY GP 125 AC reliable?
The ROYAL ALLOY GP 125 AC is more reliable than average for its class: 87.6% of its 965 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #1725 of 5428 models.
What does a GP 125 AC fail its MOT on most?
brakes — 28% of all defects recorded against failed GP 125 AC tests.
What is the best year of GP 125 AC to buy used?
By first-time pass rate, 2020-registered examples do best (90.3%) and 2019 worst (85.4%). Condition and history still trump the year.
Embed this bike
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