So, I adjusted my carb and timing then my idle, set it at about 650 or 700. Then, just recently, my idle randomly lowered down to like 450 or 500. Its stayed at the lower for the past 3 days, without me adjusting anything. What would change it to randomly lower itself? I'm happy with it there. Just curious as to why? Would colder temp do it? Because its been down in the 60's or so. But today it was like 80 and it was still low.