Royal Alloy GP 300
Real ownership data from 1,472 UK GP 300 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common GP 300 problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Brakes | dangerous | 14.5% |
| Tyres | dangerous | 8.1% |
| Lights and indicators | dangerous | 8.1% |
| Other | dangerous | 6.5% |
| Exhaust and emissions | major | 4.8% |
| Steering and head bearings | dangerous | 4.8% |
| Wheels | dangerous | 4.8% |
| Suspension | dangerous | 4.8% |
Advisories (wear noted but not failed) are excluded above; the most common is frame and structure.
GP 300 mileage and reliability by year
Use this to judge whether a specific bike is high or low mileage for its age.
| YearYear | MedianMedian mileage | Mi/yrMiles/year | MOT passFirst-time pass | |
|---|---|---|---|---|
| 2026 | 8 | — | — | — |
| 2025 | 70 | — | — | — |
| 2024 | 381 | 3,289 mi | — | 100% |
| 2023 | 230 | 2,532 mi | 810 | 93.97% |
| 2022 | 348 | 3,279 mi | 698 | 91.26% |
| 2021 | 168 | 4,046 mi | 495 | 91.77% |
| 2020 | 267 | 5,199 mi | 668 | 92.28% |
GP 300 questions, answered with data
What are the most common problems with the Royal Alloy GP 300?
Across 1,472 UK examples, the most frequently recorded MOT faults are brakes (14.5% of all recorded faults), tyres (8.1% of all recorded faults), lights and indicators (8.1% of all recorded faults).
What is average mileage for a Royal Alloy GP 300?
The median Royal Alloy GP 300 in the UK has covered 3,782 miles, and typically rides about 640 miles a year. Half of all examples fall between 1,938 and 6,515 miles.
Is the Royal Alloy GP 300 reliable?
91.97% of Royal Alloy GP 300 MOT tests are passed first time, with an average of 0.03 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 1,472 Royal Alloy GP 300 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.