2008 Harley-Davidson Flstf FAT BOY 1.6L Petrol · AE08 FAS

The most recent DVSA MOT test on 4 March 2026 resulted in a pass, continuing an unbroken run of passes stretching back to 2015. The overall maintenance trend appears broadly stable rather than deteriorating, with no immediate test failures and only a minor advisory concerning rear brake pad wear. It is worth noting, however, that the rear brake pad advisory has now appeared at two consecutive tests (September 2024 and March 2026), indicating a recurring wear pattern that is progressing toward replacement rather than being a one-off observation. The exhaust noise advisories from 2017 and 2022 are intermittent and may reflect natural ageing of the system rather than an active fault, but on a V-twin of this vintage the exhaust mounting points, header gaskets, and baffle integrity should be confirmed on inspection. Recorded mileage stands at 40,212 miles across approximately eighteen years, equating to an average annual usage of around 2,234 miles. This is notably low for a motorcycle of this age and suggests either light weekend or fair-weather riding, or extended periods of standing between uses. Such a usage profile carries its own mechanical implications; components that suffer most from low mileage and inactivity are typically the 12-volt battery, brake calipers, brake discs, and certain rubber and fluid-based items. Significant gaps between MOT entries (most notably between 2018 and 2021) suggest the machine may have been laid up for considerable periods, which often accelerates standing-related degradation even where overall mileage is modest. Given the recurring rear brake pad advisory and the known failure of a rear caliper securing bolt recorded in January 2017, the braking system warrants particular attention. A prospective buyer should inspect the rear brake pad thickness directly and check that the rear caliper is mounted securely with all fixings present and torqued correctly, as missing or loose caliper bolts are both a safety concern and an MOT failure item. On a test ride, listen for any metallic grinding or squealing under braking, feel for excessive lever or pedal travel, and watch for pulling to one side which could indicate a binding caliper from corrosion after prolonged standing. The rear brake disc should also be checked for lipping, rust pitting around the circumference, and corrosion on the mating surface, as calipers that seize slightly when cold can produce uneven pad wear and shuddering under application. Beyond the recorded MOT items, several age-related checks are strongly advised for an eighteen-year-old Harley-Davidson, regardless of its modest mileage. Tyre sidewalls and tread should be examined for perishing, cracking, and flat spots from standing, as tyres older than five years typically require replacement even with adequate tread depth. The 12-volt battery should be load-tested, as low mileage and long inactivity are the leading causes of premature battery failure in motorcycles of this era. Engine and primary chaincase oils, along with brake fluid, fork oil, and any hydraulic clutch fluid, should be considered time-expired rather than mileage-expired, with brake fluid in particular being hygroscopic and due for renewal roughly every two years. Finally, the exhaust system should be inspected for corrosion around the headers, mounting points, and silencer joints to address the historic noise advisories, and all electrical connections, earth points, and the charging system output should be verified to guard against the issues commonly caused by intermittent use.