if its still got the black plastic backing behind the air cleaner cover then its probably stock air ., if it hasnt then it prob has a high flow filter..... check under the seat and you might be able to spot a fuel pack of some sort

alot of the fuel packs are about the size of a pack of cards and sit under the seat , start your bike with seat off and if you see some flashing lights when you give it a rev you prob have a fuel pack ...

i dont know how to tell if you have had a sert installed cause i think its just a download