2021 Triumph Bonneville T100 0.9L Petrol · DG71 AHO

The 2021 Triumph Bonneville T100’s latest MOT test on 2025-09-18 resulted in a clean pass, indicating no functional failures or structural defects at that time. However, the advisory conditions from the preceding MOT on 2024-09-09—particularly the rear brake pads nearing minimum thickness (1.1.13 (a)) and the front pads also approaching replacement limits—suggest a maintenance trend that has not yet resolved. While the vehicle has not failed an MOT, the persistent advisories indicate ongoing wear on brake components, which, if unaddressed, could lead to reduced braking performance, increased stopping distances, or even failure to meet the minimum legal requirements for friction material thickness. The absence of further advisories or failures in the intervening year implies that the owner has either been proactive in addressing these issues or that the wear rate has slowed. For a buyer, this should prompt a thorough review of the maintenance history to confirm whether the pads have been replaced or if the advisories remain unresolved. The recorded mileage of 3,271 miles for a vehicle aged five years represents a notably low annual usage rate of approximately 654 miles per year, which is unusually low for a motorcycle of this class. Such low mileage often correlates with periods of prolonged inactivity, particularly if the vehicle has been stored rather than used regularly. This usage profile can lead to specific wear patterns—such as potential corrosion from standing in damp conditions, particularly on brake components, suspension elements, and the exhaust system—while also affecting consumable items like tyres, fluids, and electrical systems. Conversely, if the vehicle has been used sparingly over recent years, the wear on components like brakes and suspension may not have progressed as rapidly as one might expect for its age. However, the advisories from the 2024 MOT suggest that the brake pads have been subjected to consistent use, even if the overall mileage is low, which could indicate either infrequent but regular riding or a pattern of short trips that stress the braking system. A buyer should be cautious about the implications of this wear progression and consider whether the advisories have been rectified or if the vehicle has been ridden in a manner that exacerbates component fatigue. In evaluating this vehicle, the buyer should commence with a comprehensive inspection of the brake system, focusing on the front and rear pads, discs, and calipers. The advisories from the 2024 MOT highlight that the pads are critically low on friction material, which could lead to reduced stopping power, increased heat generation, or even seizure if the pads are not replaced soon. During a test drive, listen for any unusual noises from the brakes, such as grinding when applying the brakes, which could indicate metal-on-metal contact if the pads are too thin. Additionally, check for uneven brake pad wear or excessive heat discolouration on the discs, which may signal that the pads have not been replaced or that the vehicle has been driven at high speeds or in heavy traffic. Inspect the brake fluid reservoir for contamination or bubbles, as this could indicate a leak or air ingress, which would compromise braking performance. If the advisories remain unresolved, the buyer should insist on immediate replacement of the brake pads to avoid compromising roadworthiness and safety. Beyond the brake system, the buyer should conduct a detailed examination of the vehicle’s structural integrity, fluid levels, and electrical components, given the low mileage and potential periods of standing. Check the suspension for signs of corrosion or binding, particularly around the rear swingarm mounts and shock absorbers, as prolonged exposure to moisture can accelerate rust formation. Listen for clunking noises from the suspension during cornering or over bumps, which may indicate worn suspension bushes or damaged coil springs. Inspect the tyres for sidewall cracking or perishing, which can occur even with low mileage if the vehicle has been stored for extended periods without proper care. The tyre tread should be checked for uniform wear, as uneven wear patterns may suggest misalignment or suspension issues. Verify that all fluids—oil, coolant, brake fluid, and transmission fluid—are at the correct levels and show no signs of contamination or degradation. Given the vehicle’s age, the battery should be tested for strength, as older batteries can fail prematurely if not maintained. Finally, a thorough visual inspection of the exhaust system for corrosion or leaks is essential, as standing in damp conditions can accelerate rust formation on exhaust components. If the vehicle has been used sparingly, the buyer should also consider a service history review to confirm that time-based maintenance tasks, such as fluid changes and filter replacements, have been completed according to the manufacturer’s recommendations.