2021 Triumph Bonneville Speedmaster 1.2L Petrol · CX09 MON

A pattern of intermittent tyre maintenance defines the recent roadworthiness record of this motorcycle, punctuated by a significant safety failure in September 2025. While the machine successfully passed its most recent assessment on 16 September 2025, that same day it was initially issued a dangerous failure notice due to the rear tyre tread depth falling below the 1.0mm legal minimum. This indicates a failure to monitor consumable wear until the point of total depletion, contrasting with the otherwise clean pass recorded in October 2024. The history suggests a vehicle that has not required structural or mechanical intervention beyond standard wear-and-tear items, yet the nature of the 2025 failure highlights a reliance on reactive rather than proactive component replacement. Accumulating 7,547 miles over five years results in an average annual usage of approximately 1,509 miles, placing this motorcycle well below the typical mileage profile for a machine of this class. This low-intensity usage pattern often shifts the primary mechanical concern from high-cycle component fatigue to the potential for environmental degradation and the effects of prolonged periods of inactivity. While the engine and drivetrain have seen limited operation, the infrequent use can lead to the hardening of rubber seals, the settling of fluids, and the potential for internal corrosion if the machine was stored in damp conditions without adequate preparation. Given the recent failure regarding the rear tyre, a thorough inspection of the current rubber is essential, specifically looking for signs of cracking or sidewall perishing that can occur during long periods of storage. When conducting a test drive, pay close attention to the feel of the rear brake and the stability of the rear end under acceleration, as the previous tyre failure may have been exacerbated by alignment issues or heavy braking habits. Listen for any unusual resistance or dragging sensations from the rear wheel, which could indicate that the braking system has suffered from the effects of infrequent use and requires cleaning or lubrication of the caliper slide pins. The suspension and steering components have not been flagged for any defects, but the low mileage does not guarantee their current integrity. During the test ride, perform a series of controlled stops to check for any pulsing or judder in the brake levers, which would suggest warped discs or uneven pad wear resulting from the bike sitting stationary for extended intervals. Ensure the steering head bearings move smoothly without any notching or resistance, as these are sensitive to the lack of regular movement. Verify that the engine reaches operating temperature without hesitation or erratic idle, as fuel system components on low-mileage machines are particularly susceptible to the build-up of deposits from stagnant fuel.