2021 KTM 125 Duke 20 0.1L Petrol · AF21 FUG

The vehicle most recently passed its MOT on 9 June 2026, but the overall maintenance trend is concerning. A comparison between the 2025 and 2026 records reveals a stagnation in upkeep, as several advisories regarding the rear tyre, drive chain, and front fork seal have persisted for over a year without being rectified. This suggests a reactive approach to maintenance rather than a preventative one, indicating that the vehicle is being operated at the minimum legal limit of roadworthiness without the necessary corrective work being performed between tests. With a recorded mileage of 4,757 miles over approximately five years, the annual usage is exceptionally low at roughly 951 miles per year. While this implies minimal wear on the engine and gearbox internals, such low utilization often introduces specific risks associated with long periods of standing. Mechanical components can suffer from inactivity, and rubber components may degrade due to age rather than use, making a thorough physical inspection of the chassis and consumables essential to ensure the bike has not suffered from neglect during periods of dormancy. Prospective buyers must prioritize the inspection of the drivetrain and suspension. The recurring advisories for a worn drive chain and sprocket, combined with improper tension, indicate that a full chain and sprocket kit replacement is imminent. During a test drive, listen for excessive chain clatter or erratic power delivery. Furthermore, the reported oil misting on the nearside front shock absorber suggests a failing fork seal. Inspect the stanchions for visible oil residue, as a leaking seal can compromise braking stability and may eventually lead to oil contaminating the front brake discs. Given the low mileage and age, check for tyre perishing, specifically looking for fine cracks in the sidewalls which can occur even if the tread remains legal. Verify the health of the 12V battery and ensure the engine oil and brake fluids have been changed according to the manufacturer's calendar intervals rather than mileage alone, as these fluids degrade over time. Finally, examine the brake discs for surface corrosion or binding calipers, which are common symptoms of a vehicle that has spent significant time stationary, and refer back to the 2024 advisory regarding brake effort fluctuation to ensure the system is now operating smoothly.