Im wondering what the symptoms are for each. After a couple hours of searching it seems like many of the indications are almost the same. Maybe its just my confusion with the termonlogy being used. Some say popping on deceleration is a sign of being lean and some say its completely normal. So heres the deal. I have an 08 SM with about 3000 miles on it. I installed a SSW/MRD shorty system and a TT FCR kit with a Merge APS and extended fuel screw. The basic jetting guidlines told me that jetting I needed was exactly what came with the TT kit. Sea level with an uncorked pipe. The bike runs strong but it has a low to mid throttle hesitation. As in when the throttle is held constant while cruising and a lot of popping on decel. When I open the trottle further, it goes away. So Im thinking Im lean. I played with the fuel screw a bit today. When I close the fuel screw, the bike dies. But when I adjust it out with the bike running, there doesnt seem to be much of a change. To top it off, the hesitation seems worse when its hot and humid out, like today, which would make me think that Im actually running rich. So Im totally confused. Someone please school me before I throw in the towel and take the bike to someone who actually knows what they are doing. I would really like to learn myself. Thanks!