The 2 K&N filters are normal. That is what I have, they are also known as pod filters. I reccomend to run outerwears if you don't already have them. These filters are not too good for riding in wet environments. Bigger carbs can always help, but it is good to know what kind of porting was done or who did it. I am running stock carbs with ported cylinders. I use to have T5's also but went to a different type of pipe.
If you just got the bike I would advice for you to go through the bike. Clean carbs(check jets so you can know what you have), oil change, clean air filters, lube your cables. By checking your main jets can also give you some what of an idea if it was ported or not.
Check your compression to see if you should be running hi-octane or 50/50 mix.