a 110 guru told me the other day, that his 110, wouldn't idle, and he tried all kinds off things, and finally what it was, was the cdi springs, were worn out, and wasn't pulling it back together fast enough, put new springs on, and it idled like a dream
I had idling problems with my 185, and i put a new needle and seat in the carb, and it now idles the very best
good luck
Caution
Do not "POP WHEELIES" and run for any distance with the ATC. The oil capacity is relatively small and the oil will drain out of the oil pump area thus causing loss of oil pressure, resulting in costly engine damage -CLYMER