I need help guys!! I'm an idiot when it comes to carbs, and after much fear and anxiety, I had to open up my carb for adjustment after and exhaust mod, and I need some help. Here's what I have: Year: 2002 Model (400 - 426 - 450): 426 Cam Timing (WR/YZ): WR Main jet: 168 Pilot Jet: 42 PAJ: 75 MAJ: 200 Leak Jet: N/A Starter Jet: 65 Fuel screw (turns out): White Bros. 2 out (set to original) Needle Model/Clip position: Stock needle, was in clip 4, tried 3 w/o success Grey Wire Mod (Y/N): Y TPS Connected (Y/N): Y Airbox Snorkel/Lid (on or off): Lid off AIS Removed (Y/N): N/A Airfilter Brand: NoToil Exhaust Brand: Jardine RT4 w/Jardine mid-pipe, FMF Powerbomb SS Header (This was the recent change stimulating this) Average Altitude: 3500-7000 MSL Average Temperature: 70 Average Humidity: 7-18% Degree of Satisfaction (0-10): 8 Additional Mods/Comments: Prior to addition of Powerbomb header, only symptom at all was intermittent off-idle bog when hot. Otherwise flawless. Installed Powerbomb header and warm idle at 4000, will not back off with throttle whack. Raise Needle clip to #3, and now bogs at throttle whack, changed to clip #5, no bog, no change in idle. Help please. I've read every jetting post since I've joined to try to gain an ounce of an idea, and I can't figure this out, and I need it done soon as I'm trying to sell the bike. Hopefully getting a 2005 WR450 today. Should I go with a larger PJ? The MJ was fine prior to the change, and I haven't been able to ride yet to test if I need change.