I have an 07 Husky 610sm with a Leo Vince slip on, stock otherwise. I installed the JD jetting kit. It runs great except it hiccups from time to time when throttle is held steady at around 4600-4800 rpm, which it did before I installed the kit. Otherwise it runs great. I live in Mississippi around 500 ft above sea level. Two questions before I go back into the carb. 1. I used the #180 main jet which the instructions said to use for a "free flowing" exhaust. Would a slip on qualify as free flowing? Otherwise I am advised to use #178. 2. I used the blue needle, the richer of the two, for low altitude/cool temperature with the clip at 5th from top. I am assuming that I will play with the clip position to lean up the midrange. I have the mixture screw 2 turns out. Is the "hiccup" the result of a too rich midrange? I wouldn't think it would be ignition in just that one place in the rpm range. If I knew for sure I wouldn't be asking the experts! Any advice will be appreciated!