2015 Triumph Thunderbird 1.7L Petrol · GV15 EYB

A recurring pattern of front‑brake binding, exhaust non‑road‑legal markings and progressive tyre wear dominates this 2015 Triumph Thunderbird’s MOT history, with the most recent test on 24 April 2026 recording a pass but still flagging the front tyre as close to the legal limit. Earlier that month the rear tyre failed a dangerous tread‑depth check, and a 2022 failure listed major faults for both front brakes binding, exhaust noise and illegal exhaust markings, while an engine management warning has appeared on several occasions. The overall trend shows a vehicle that has cleared recent tests but carries a legacy of brake, tyre and exhaust concerns that have not been fully resolved. At just 19,212 mi after eleven years the average annual accumulation is roughly 1,750 mi, well below typical usage for a motorcycle of this age. Low mileage often indicates limited on‑road exposure, which can reduce wear on drivetrain components but may also point to long periods of inactivity. Inactivity can exacerbate tyre surface hardening and uneven wear, as reflected in the repeated tyre advisories, and can allow rust to develop on exhaust brackets and brake hardware. The consistent yearly testing schedule, with no significant gaps, suggests the vehicle has been regularly presented for inspection despite its modest use. Prospective buyers should treat the brake system as a priority. The 2022 binding failure on both front brakes implies possible seized caliper pistons, warped discs or compromised brake lines; the 2023 advisory that rear pads are within 2 mm of the minimum limit further indicates that the braking circuit is nearing the end of its service life. On a test drive, feel for any pedal pulsation, excessive travel or pulling to one side, and listen for grinding or squealing that would confirm worn pads or discs. A thorough inspection of caliper movement, pad thickness and disc condition is advisable before committing. The exhaust and engine management issues also warrant close scrutiny. The 2022 major faults recorded illegal markings on both exhausts and excessive noise, coupled with recurring engine warning lights, suggest possible leaks, damaged silencer internals or sensor faults affecting emissions compliance. Listen for hissing, rattling or unusually loud exhaust tones, and verify that the engine warning light remains extinguished after a short run. A diagnostic scan to clear and read any stored fault codes, together with a visual check of exhaust mounts and the condition of the catalytic system, will help confirm whether the motorcycle can meet current road‑legal standards.