Hello all, I have a 2008 DRZ400sm that I bought a few months ago. It has 3x3 mod, FMF Q4 muffler, 39mm FCR Slant-Body Carb. I bought the FMF Powerbomb header to match the exhaust. I decided to take my carb off and clean it while changing header and see what is in there. I am somewhat new to carbs so there are a few things I am trying to figure out. From what I see, I have a DXP needle, 165 main jet, 45 pilot jet, 200 main air, and 65 pilot air(?). All jets are the Keihin jets. So, I have a few questions, which I will address with what I know and have been told. Also just listing my plan so please advise if something sounds wrong. 1. It was running a little rich before so I am jumping down to a 160 but also getting a 162 if I want to go back up a bit. 2. Leaving the pilot jet at 45 (seems to be the recommended size for having these mods) 3. Leaving the main air at 200 (also recommended) 4. Not sure what the deal is with the pilot air jet. Not even positive that is what this jet is but went with process of elimination. I am referring to the jet to the right of the main jet in my image. Most things I saw recommended a 100 pilot air, but I also saw a different post saying the pilot air depends on weather or not you have removed the coast enricher (which I have not). Any advice here would be greatly appreciated. Current size is 65. 5. My friend recommended a EMN needle which it looks like a lot of other people use as well. So I was probably going to do that. 6. Also ordered the "R&D flex-jet" extended mixture screw. Was going to start around 2.25 turns and go from there. That is all the stuff I have going on. Hopefully some of you more knowledgable people can help me out or provide some info. Thanks!!!!