Hello all. I'm new to the forum and would like to know if the needle on the 400ex is adjustable. I'm running with a Lexx slip-on, K&N filter and an open air box. My main pilot is a 170 and the slow is a 42 with the air screw turned out 3 times. The bike runs, idles and pulls like a champ at WOT but when I took it for a test run (with a new plug) down the block I shut it off and pulled the plug the top of it was white as hell so I know I'm lean. If the main is too large could that cause the issue? Do I need a larger slow jet even though it starts and idles with great response? Turn out the air screw another half even if it's already turned out three times or buy an adjustable needle and set the clip where it needs to be? I know it's alot but I'm going riding tomorrow and I don't wanna be the one getting towed out of the woods. Any suggestions would be greatly appreciated.