2018 KTM 790 Duke 18 0.8L Petrol · FN18 TYK

The most recent MOT, conducted on 13 June 2026, was passed but recorded a minor defect – the off‑side front brake‑fluid reservoir was below the required minimum level – and an advisory concerning a noisy off‑side rear exhaust. Over the preceding five years the bike has shown a mixed pattern: two advisories relating to the drive‑chain being slightly loose (2022 and 2025) and a single advisory for the rear exhaust (2025). Apart from these isolated items the majority of tests have been clean, indicating a generally stable maintenance regime with only occasional wear‑related warnings rather than a progressive deterioration. At eight years old the Duke has accumulated 15,492 miles, equating to roughly 1,936 miles per annum – well below the typical annual mileage for a sport‑bike of this class. Such low utilisation suggests periods of limited riding or extended storage, which can be as significant as high mileage in terms of component health. Light use often means fewer cycles on the engine, suspension and brakes, but it also raises the risk of ageing‑related issues such as rubber cracking, corrosion on metal parts, and battery capacity loss. There are no obvious spikes in mileage that would point to a period of heavy abuse, so the wear profile should be relatively benign provided the bike has been stored properly. When you inspect the motorcycle, give particular attention to the drive‑chain and its tensioning system. A chain described as “slightly loose” can develop excessive wear on the sprockets, produce a characteristic rattling on acceleration, and may lead to premature chain stretch if not retensioned and lubricated correctly. Check that the chain pins and rollers are not corroded, that the master link is secure, and that the adjusters hold the chain within the manufacturer’s specified tolerance. Verify the brake‑fluid level and top it up if necessary, then consider a full fluid change if the last service was more than twelve months ago, as moisture ingress can lower the boiling point and affect braking performance. Listen for any abnormal exhaust notes from the off‑side rear pipe; a noisy exhaust may indicate a cracked pipe, loose mounting, or a failing muffler, which could affect emissions compliance and rider comfort. Beyond the specific MOT notes, a thorough visual and tactile examination of age‑related items is advisable. Inspect the tyre sidewalls for cracking, dry rot or hardening, especially if the tyres are original; even with low mileage, rubber degrades with time and may need replacement. Examine the 12 V battery for sulphation, swollen cells or a low resting voltage, and be prepared to replace it if it shows signs of ageing. Check the front and rear brake discs for surface corrosion, glazing or uneven wear that could cause shudder under braking. Look for any rust on the frame, suspension bushes and swing‑arm pivots, and confirm that the coil springs and fork seals are free of leaks. Finally, review the service book for evidence of regular oil changes, coolant flushes and valve clearances; a well‑documented service history will complement the MOT record and give you confidence in the bike’s overall roadworthiness.