I just got a FCR in the last batch from the TT store. I did the install with the one jet removed, 1/4"id 1/16" thickness o-ring, adjustable fuel screw, and jetting for 3x3 and open pipe at sea level. My issues are as follows. Harder starting on or off choke when cold (what temp should I use choke and when should I just use throttle pumps?) On 4 occasions the bike stalls when snapping the throttle closed after a wot run on the highway. The bike has a flat spot in the mid rpm power delivery. There is a bog when getting on the power after feeling the flat spot. There is a bog when shifting gears while cruising at medium load. I have tried to double up the thin o-ring but will go on a quest for the thicker ones this week. I have turned the AP screw out 1/4 to 3/8 and don't feel a change. I had the air boot off and watched the AP squirt but I can't see anything as it happens so fast when I snap the throttle. Mods are 3x3 in the back most airbox top corner, "E" model FMF bomb head pipe and uncorked Yoshi off road slip on. The exhaust is being replaced with the SSW/MRD as soon as it comes. Any help or suggestions? Turn the ap out more? Get the right o-ring? Get the merge ap spring? Fix the pipe?