2018 Triumph Bonneville 0.9L Petrol · LC18 SVJ

The Triumph Bonneville presents a stable and reassuring maintenance trend, with five consecutive MOT passes and no dangerous or major defects recorded across the entire history. The most recent test on 10 June 2025 at 7,562 miles resulted in a clean pass, the sole advisory being slight cracking on a front tyre, a minor consumable issue typical of a machine that has covered very low mileage. There is no evidence of worsening mechanical or structural deterioration, and the record suggests consistent, careful ownership. The mileage pattern is exceptionally low for an 2018 machine, averaging roughly 945 miles per year. Between the June 2021 test at 2,309 miles and the June 2025 test at 7,562 miles, the bike accumulated approximately 5,253 miles over four years, a modest rate that points to light recreational use rather than daily commuting. The annual increments are steady, with no sudden spikes or suspicious gaps in the record, and the odometer progression aligns logically with the test dates. Long periods of standing are a plausible explanation for the low annual mileage, which can itself introduce specific concerns despite the clean MOT outcomes. A buyer should pay close attention to the condition of rubber components that degrade with age rather than mileage. The front tyre cracking noted in the June 2025 test warrants inspection, and both tyres should be checked for sidewall perishing, date codes, and tread depth, as a machine standing for extended periods will develop dry rot well before reaching high mileage. Suspension seals, fork oil, and brake fluid condition deserve scrutiny, since infrequent use can lead to moisture absorption in brake fluid and deterioration of fork seals through sitting rather than cycling. The chain and sprockets should be examined for corrosion and correct tension, as a bike ridden sparingly may not generate enough heat to keep drivetrain components dry. Structurally, the frame, welds, and subframe mounting points should be inspected for surface corrosion, particularly around the rear subframe and any areas exposed to road salt during short winter rides. Exhaust headers and fixings should be checked for heat-cycle cracking and rust jacking at joints. While the MOT record is clean, the low-mileage profile means this Bonneville's condition will depend far more on how it was stored and how frequently it was exercised than on the test data alone. A short test ride to assess cold-start behaviour, gearbox smoothness, and brake feel is strongly recommended before purchase.