theres like a million things you can do it just stops when your bank account is empty lol
first off i would replace wheels for a bit of piece of mind
change bars if you dont like origonal ones
some nicer grips
change carby to something that will offer more power (oko 26 flatslide or a kehin pe26)
sticker kit to be different
a better chain
tyres
v2 head
levers
fork oil and an elka shock
HD clutch springs