% of jetting lost due to colder air (weather)

[Honda4ooEX]

Somone on here said that you lost a certain % of your jetting due to a certian number of degress dropped in air temperture. Like 9% or something. If you know this then if you are jetted perfect for summer riding, then you could in thought do the math, and just swap jets one time and be perfect for the winter right? Anyone have any thoughts on this?

[Texan32]

I don't know the actual #'s, but i do know this. 4 strokes are not as touchy when it comes to temp changes. I am running a 165. In the summer in ND, it gets up in the high 90's and in the winter, if it was 20ish outside, i was riding! I never really had a problem. I had thought about just putting the lid on the air box, but after doing a plug check after playing for 30 or so minutes, it didn't appear to be running hot. I'm no expert, but if it ain't broke, don't fix it.

...just my experience