Jetting for winter and summer

In the summer should I use a lower jet(pilot) number, and in the winter should i use a higher number jet(pilot) or is it the other way around, and for the main jets in the summer? lower or higher number? and in the winter higher or lower?

Depends. Sometimes you just need to fine adjust the air screw or fuel screw and move the needle a few positions. Temp is only part of the equation. It is all about air density.

Denser air needs richer jetting, thinner air needs leaner jetting. You do not jet 'just because' you change jetting to resolve running issues on a healthy engine.

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