I got a 3rd hand '00 WR400 and put a pod air filter on it in addition to the FMF Q that was on it when I bought. But it runs a little wierd so I figured I'd rip the carbs apart and see what I have. PO claimed it was jetted. Well, I guess. I pulled all hte jets and this is what I have. 168 main 45 pilot 168 starter stock needle #3 slot 200 main air 75 pilot air 1.75 turns on idle mixture screw Now that doesn't look so bad except for the 200 main air. Has anyone seen that before? BTW is the idle mixture screw what some people call the "fuel screw"? I'm guessing it is as nothing else makes sense. I'll repost about drivability again when I test this filter vs a stocking to see if this filter is really breathing enough. I don't think it is.