2017 Ducati M821 0.8L Petrol · PN17 OTV

The Ducati Monster 821 uses an 821cc L-twin engine that returns roughly 45-55 mpg in mixed riding, so fuel costs will depend heavily on how often and how far the new owner rides. Annual road tax for a motorcycle of this capacity sits in the higher bracket, and insurance for a middleweight Ducati sports naked typically falls into groups that can be expensive for younger riders but manageable for those over 30 with a full licence and clean record. Servicing intervals on the M821 are relatively short, and main dealer or specialist labour rates for Ducati work are noticeably higher than for Japanese equivalents.

Assuming a modest 3,000 miles per year — a realistic usage rate if the new owner actually intends to ride it — expect fuel in the region of £400-£550, road tax around £100, insurance anywhere from £250 to £600 depending on profile, and routine servicing plus tyres likely adding a further £400-£700. A realistic annual running cost before any major work would therefore sit in the £1,200-£1,900 range, with the caveat that a major service, brake refresh, or chain replacement can easily push that higher in any given year.

Although the MOT record shows no defects or advisories across three tests, the gaps in testing and the very low mileage mean there is limited mechanical evidence to go on. Inspect the tyres carefully for age-related cracking — look for the DOT date code on the sidewall — because tyres older than five years harden and lose grip regardless of tread depth. Check the chain and sprockets for surface rust and stiff links, which are common on bikes that have been stored rather than ridden. Lift the front brake lever and check for firm feel; seized calipers from disuse are a frequent finding on low-mileage motorcycles.

Beyond the MOT-visible items, this generation of Monster 821 is known to need occasional clutch slave cylinder attention, and the regulator-rectifier and battery can fail on bikes that have been left standing. Ask the seller to demonstrate a cold start so you can listen for excessive rattle from the cam chain tensioner area and check that the idle settles smoothly. Inspect under the bike for any oil residue around the sump, swingarm pivot, and front sprocket cover. Finally, check that all dashboard functions, indicators, and lights work correctly — electrical gremlins from rodent damage or a discharged battery are common on stored machines.