I bought my Sporty in June, and it came with SE slip-ons already. Fast forward to today, I checked the air filter and realized it was toast, so I began thinking about getting the SE air cleaner kit. I know jetting is needed for it, but here's the kicker- the factory plug for the idle mixture (I believe) is already missing. Is this a good indicator that the jets have been changed, or do I need to remove and disassemble the carb to find out?

 

You don't have to remove the carb, you can just remove the A/C and drop the float bowl.
With the SE A/C, your starting point for jet sizes should be #45 pilot and a #180 main.

 

Thanks cHarley! I just checked it out, still has the stock jets :/ . That being said, getting to them is way easier than I thought! Time to get larger ones and the SE kit!

 

It's a good indication that it's been rejetted. I'd just put a good air cleaner on, if the bike starts coughing/sneezing back throw the carb then it needs to be rejetted.
I would buy a K&N filter kit before I'd buy that piece of junk SE thing.

 

He said above that it has stock jets.