okay read ur freakin manual. From racing I can tell u that when it gets colder between races I richen a 1/4th turn. it comes off the same temp cause when the air is colder it has more oxygen molecules pure air so u need more fuel. I used to think it was the other way around but when I got a .21 motor it came true to richen when it gets colder. and lean to a point when hotter. but this mostly pertains to weather in the 0-50 degree.