2001 Triumph Bonneville 0.8L Petrol · Y475 ACL

The defining mechanical story of this Triumph BonNEville is centred on its braking and throttle control components, which culminated in a Dangerous failure on 11 July 2026 that was subsequently rectified to enable a Pass just ten days later on 21 July 2026. The earlier test flagged a sticking and fraying throttle cable, alongside both front and rear brake discs recorded as significantly and obviously below serviceable limits, while the retest issued an advisory for a binding front brake. Combined with prior advisories on rear brake disc wear, rear brake binding, and a rear brake disc also noted as worn in 2025, there is an established pattern of brake system deterioration that has now progressed from advisory level to outright failure. The 2026 outcome is an improvement on the failure itself, but the underlying wear trajectory suggests the braking system warrants close scrutiny before purchase. Recorded mileage stands at 34,300 miles across twenty-five years, equating to an annual accumulation of roughly 1,372 miles, which is substantially below average motorcycle usage and indicates either extended periods of light use or significant standing time. Despite this low average, annual MOT tests have been conducted consistently since at least 2023, suggesting the machine has remained taxed and largely roadworthy throughout. From a mechanical standpoint, low annual mileage of this nature typically reduces wear on high-cycle components such as the engine, transmission and chain, but conversely elevates the risk of deterioration through standing, including corrosion on exposed metal components, drying and perishing of rubber items, brake seizure from infrequent use, and cable fraying or sticking precisely as observed with the throttle cable in the 2026 failure. For a prospective buyer, the most pressing priority is a thorough inspection of the braking components. Both discs were flagged as seriously worn at the 2026 test, and although they presumably have been replaced to achieve the subsequent pass, this should be verified by direct inspection, with particular attention to disc run-out and pad condition. A test ride should include repeated firm brake applications from speed to confirm straight-line stability and absence of pull, as binding calipers were noted at both the 2025 and 2026 tests. The throttle action must be checked for smooth return, with the ignition off the cables should snap fully closed when released, and any hesitation, sticking or notchiness would warrant immediate cable renewal given the recent fraying failure. Additionally, the 2023 advisory regarding light oil misting on the offside front shock absorber should be followed up; check for any visible weeping down the stanchion, and during the ride listen for clonks or uneven damping over uneven surfaces, as standing periods combined with seal ageing can accelerate shock deterioration. Finally, inspect the exhaust note, as a 2024 advisory noted excessive noise, and examine the rear tyre carefully for any repair from the nail recorded in 2025, confirming full integrity before purchase.