Hey chaps

I bought my bike used a few days ago. I knew it had a K&N filter (from the sticker), and a previous dealer that serviced the bike said the owner has mentioned something to do with exhaust internals.

Messing around with the bike yesterday, I thought the air box seemed odd, and looking around this forum I realised the snorkel had been removed. Not a problem in itself, but annoying not to have the part. Anyway, I've not seen any fuelling changes. I'm guessing if the guy has gone to the trouble he has, he must have done something to compensate for the air mods. Can anyone tell me what to look for and where???

Thanks! I'll post up what I find - if anything!