I am finished with "daves mods" for my 2003 xr650L! The bike runs great, has way more pull throughout the gears, starts and idles like never before:) this mod is a must for 650l owners! i installed a fmf q2 afterwards, adding a bit more power and smootheness. I went with 160main, 55 pilot, a bit less than 2 screws out, 1 dubro washer for the needle. I ordered the jets from "carb parts" and received them in 4 days:) Id like to thank everyone who responded to my forum questions, the bike runs great!