Stock filter is in a box under the seat with good bit of plenum to get air to the intake. You can get a K&N for the stock plumbing, but I wouldn't worry about the increased air flow with those.
If your air filter is under the bear claw, then you have a real upgraded air kit.
A $20 cable and tuneecu for free will give you the ability to read the tune as well as upload your own. You can alter the fan on temp for the radiator, correct the error in the speedometer and get other information for maintenance issues.
Search the forum for lonelec cable and Tuneecu.