2021 Triumph Bonneville Speedmaster 1.2L Petrol · SO21 BGU

This Triumph Bonneville Speedmaster has demonstrated consistent roadworthiness over its MOT history, with both tests in October 2024 and September 2025 passing without any recorded defects. The most recent inspection, just under a year ago at 2,657 miles, confirms no outstanding issues requiring immediate attention. The absence of advisories or failings across both tests suggests the vehicle has been maintained at a basic level, though the sparse record does not reveal deeper mechanical history beyond these two data points. The recorded mileage of 2,657 miles at the time of the latest MOT—paired with the vehicle’s 2021 registration—indicates an exceptionally low annual average of approximately 531 miles. This suggests either minimal usage or prolonged periods of storage, which could impact components like the battery, tyres, and suspension fluids. The gap between tests, spanning 365 days with only 988 miles accumulated, aligns with typical MOT intervals but does not provide insight into intermediate care. Without additional service records, it remains unclear whether critical fluids, such as brake fluid or coolant, have been refreshed according to manufacturer recommendations. Given the lack of faults in the MOT history, a buyer should prioritise an in-person inspection of high-wear items that are not routinely tested. The suspension, particularly the rear bushes and coil springs, should be examined for uneven wear or corrosion, as prolonged low-mileage periods can accelerate deterioration from static loads. Brake discs and pads, while not flagged in the MOT, warrant scrutiny for uneven wear or binding—especially if the vehicle has been stored for extended periods, as moisture can accelerate rust formation. The battery, given the low mileage, should be tested for charge retention, and the exhaust system should be checked for leaks or corrosion, particularly around flanges. Finally, the tyres, though not noted in the MOT, should be inspected for uneven wear patterns that could indicate alignment or suspension issues.