I put an 83 xl motor in my xr 600, it has a wiesco piston, uni filter and an fmf full exhaust. I am currently running the smaller 87 carbs because the xl carbs are set up for remote choke. I am going to swap in the 30mm 83's but i'm wondering what jetting to start with. It runs good now with the small carbs but i had to turn the air screw out 2 3/4 turns to get it to run ok. I know this beast has more and i am looking for a baseline to start with. What jets should i buy and where should i buy them?