In the UK the usual thing is whether the goods are of a reasonable quality. If you've used it in some way that is unreasonable (riding across Antarctica in winter for example) then you might be screwed but if it's riding within normal boundaries, they'll struggle to argue. There's also a European Small Claims court which you could hurry up and threaten them with if you bought direct. I'd imagine a UK court would be happy to order them to pay you.
In the UK the usual thing is whether the goods are of a reasonable quality. If you've used it in some way that is unreasonable (riding across Antarctica in winter for example) then you might be screwed but if it's riding within normal boundaries, they'll struggle to argue. There's also a European Small Claims court which you could hurry up and threaten them with if you bought direct. I'd imagine a UK court would be happy to order them to pay you.
https://e-justice.europa.eu/content_court_fees_concerning_small_claims_procedure-306-ew-en.do?member=1