Service it as the manual says and not the dealer.
Itll cost you 30quid for an oil and filter and by the sounds of it, its a cheap chinese or so bike. This means youll need to keep both your engine good and your warranty as itll likely need work done at some stage.
Its a cheap bike so perhaps it eats itself a bit more so needs more regular oil changes.
Joys of buying cheap im afraid.
Itll cost you 30quid for an oil and filter and by the sounds of it, its a cheap chinese or so bike. This means youll need to keep both your engine good and your warranty as itll likely need work done at some stage.
Its a cheap bike so perhaps it eats itself a bit more so needs more regular oil changes.
Joys of buying cheap im afraid.