I have a new 2007 xr650r. I just added a baja designs dual sport kit, Trail Tech Vapor, HRC exhaust tip, open carb insulator, and rejetted. Jets are 68s, 172 (4th clip), and B53E. Pilot screw out 2.5 turns. Hard to start first time, haven't cold started since. Runs noticeably stronger. I need to optimize the pilot screw setting. A few things I am seeing are different than most of what has been talked about in the numerous threads I have been reading. 1) The pilot screw has a funky "D" shape that requires a special tool. I took my carb to the local Honda shop and borrowed their tool. They told me it costs $28 to buy one, and the Honda version of the tool is even more. My manual shows a pilot screw that has a slot for a flat head screwdriver. Is this a new "feature" for 2007? 2) Several of the philips head screws were amazingly hard to break loose. I'm tempted to go to the hardware store and buy a bunch of with allen heads (hex). Is there a "kit" already put together for this? I bought one for the case on my 74 Yamaha 100 Enduro back in the old days. 3) The most interesting difference is the airflow. Air flows through the foam filter and the stainless mesh screen right behind it. The opening from that into an intermediate chamber of soft rubber is pretty big. I have large hands and can pretty much reach into the intermediate chamber. This intermediate chamber connects to the back side of the carb. What I am confused about is the prior discussions about having to remove a couple of plastic panels to open up the airflow. I don't see any. What am I missing? Mike.