2004 Yamaha R1 1.0L Petrol · YN04 AET

The vehicle presents a stable roadworthiness profile based on its most recent MOT pass on 2 June 2026 at 40,449 miles. While the bike continues to pass its annual inspections, a recurring trend of exhaust noise has persisted for over a decade, appearing in the 2026, 2025, 2020, 2019, 2017, 2016, 2015, and 2014 tests. This indicates a long-standing condition, likely related to the exhaust system's integrity or mounting, which has remained present without escalating to a failure. The mileage history shows very low usage for a 22-year-old motorcycle, averaging approximately 1,839 miles per year. The data shows consistent, incremental growth, such as the 1,300-mile increase between the May 2024 failure and the June 2025 pass. This low-mileage pattern suggests the vehicle has spent significant periods stationary, which can sometimes lead to degradation in rubber components or seals despite the low mechanical wear on the engine and drivetrain. A prospective buyer should focus an inspection on the braking system and front suspension. The record shows intermittent issues with brake effort fluctuation, specifically a failure on 28 May 2024 at 38,502 miles due to excessive fluctuation, followed by a pass in June 2024 with slight fluctuation. This suggests the front brake system may require a thorough check of the master cylinder, calipers, or fluid condition. Additionally, the May 2023 advisory regarding a light misting of oil from the offside front shock absorber fork seal warrants a physical inspection to ensure the leak is not progressing. The persistent exhaust noise, while not a failure, should be investigated to confirm it is not masking more significant structural issues or impending exhaust manifold failure. Given the low annual mileage, checking for perished hoses, aged tyres, and the condition of the fuel system is advisable to ensure the bike has been maintained during its periods of inactivity.