Brand new EC 200 bad bog off idle to 1/2 throttle. Have changed needle to bottom clip #178 main #52 pilot, air screw 2 1/3 turns out. Tried lean settings with #35 pilot and #172 main needle top clip, and was real bad to the piont it wouldn't run. First settings seem to make it run better( will lift front wheel off idle with out dying) but still not great. Any ideas?