2021 Triumph Bonneville T100 0.9L Petrol · YT21 OCZ

The Triumph Bonneville T100 in question presents a clean and stable roadworthiness record over its recent MOT history, with the latest test on 10 April 2026 at 11,780 miles passing without any defects. This consistency extends back through the 2025 and 2024 annual tests, all of which were also passed with no advisories or failures recorded. The only anomaly is the duplicate entry on 4 September 2023, where the vehicle failed its first test at 8,730 miles before passing the retest on the same day—though no specific defects were logged, suggesting a minor administrative or procedural issue rather than a mechanical problem. The absence of recurring advisories or defects in the past two years indicates that the vehicle has been well maintained in terms of its core mechanical and safety systems, including brakes, suspension, and structural integrity. The mileage of 11,780 miles over approximately five years—roughly 2,356 miles annually—is notably low for a motorcycle of this age, particularly given the Bonneville’s design as a touring-capable machine. The gap between the September 2023 test (8,730 miles) and the April 2024 test (8,986 miles) suggests the bike may have sat unused or seen very limited riding for nearly seven months, a pattern that repeats between the 2024 and 2025 tests. While low mileage typically reduces wear on consumables, it also means components like seals, cables, and rubber bushes may not have been exercised regularly, potentially leading to stiffness or degradation over time. The lack of mileage accumulation raises questions about whether the previous owner prioritised storage over regular use, which could mask underlying maintenance needs. Given the clean MOT history, a prospective buyer should still conduct a thorough pre-purchase inspection, focusing on components that are prone to degradation even with low mileage. Pay particular attention to the suspension bushes, especially the rear shock absorbers and steering head bearings, as these can stiffen or corrode when left idle. Check for any signs of binding in the throttle or clutch cables, as well as the condition of the brake pads and discs—particularly the rear brakes, which may have seen less use and could develop uneven wear. The frame and swingarm should be inspected for surface rust or stress cracks, especially around welds and bolt points, as prolonged storage can accelerate corrosion in damp conditions. Finally, verify the condition of the battery, as low-mileage bikes often suffer from neglected electrical systems, and ensure all fluid levels—including brake and clutch fluid—are topped up and free of contamination.