The new tyre in ur bike is defected? A rare case!
Consult the owner's manual to spot where the warranty centres are located.. take to the main one.. u shud call them before going and tell them the problem ur bike have got.
Im nt sure if they wud change the tyre... as its a consumable part.. brake shoes, chains, cables etc dont come under warranty by co. policy usually...
however u might get a new silencer if it has some prominent issue..
No use going 4 the hassle if the silencer has only got a minor spot thts rusting...
All companys are producing such products, the new replacemnt u wud get might also rust very soon at some spots. dnt worry if theyr minor small spots