Funny thing is, most on here would argue I'm running lean with my 47 pilot and 147 main. I often ride my to work in sub 40-degree weather. I fire it up on full choke, immediately put it on half choke, put it into gear and go. After a mile or so, it's warm enough to run without any choke.
I've done this every morning the weather allows me to commute to work for the past 3 years without issues. (I generally ride if temps are above 35 in the morning IF they will be above 50 for the ride home.) Maybe my bike isn't lean enough. LOL
BTW, my header isn't blue either.