2015 Triumph Bonneville 0.9L Petrol · AW15 ACZ

The Triumph Bonneville has demonstrated consistent roadworthiness through its most recent MOT tests, with the final pass recorded just five months ago on 12 March 2026 at 23,600 miles. There are no recorded defects across any of the five tests since April 2023, indicating a stable maintenance history without recurring failures. The absence of advisories or minor faults suggests the vehicle has been kept in sound mechanical condition, though the lack of any test failures means no specific areas of concern have been formally highlighted by the tester. The most recent test aligns with the current date, ensuring the vehicle remains legally compliant for travel. The recorded mileage of 23,600 miles over nearly 11 years—roughly 2,145 miles annually—is unusually low for a vehicle of this age, particularly for a motorcycle. The gap between tests is consistent at approximately one year, with no rapid mileage accumulation or prolonged periods of inactivity noted. The only anomaly is the duplicate entry for 19 March 2024, where both a pass and a fail are listed at the same mileage, which may indicate a data error rather than a mechanical issue. This low mileage could imply limited use, which may have preserved certain components, but it also raises questions about whether the vehicle has been stored under optimal conditions, potentially accelerating wear in areas like seals, cables, or battery health. Given the clean MOT history, the primary focus for an in-person inspection should centre on components that are not directly tested during the MOT but are critical to long-term reliability. The suspension—particularly the rear swingarm bushes and front forks—should be examined for stiffness or excessive play, as these are not routinely checked but can degrade over time with low mileage. The braking system, while not failed, warrants closer inspection: check for uneven wear on discs or pads, and verify the hydraulic lines for leaks or binding calipers, which could indicate neglect despite the MOT’s silence. Corrosion is another concern; inspect the frame, exhaust system, and undercarriage for rust, especially around welds or areas prone to moisture retention. Finally, the electrical system—including wiring harnesses, connectors, and the battery—should be tested, as prolonged periods of inactivity can degrade these components. The absence of MOT faults does not guarantee these areas are flawless, so thorough visual and functional checks are essential.