When you pull the "choke" it richens the mix, so if your motor dies when you pull it you are probably already a little rich, I never use my choke I just hit the starter and it starts right up I let it warm up for about 5 minutes and then away i go.

I never had to use the choke.  When I rejetted main, pilot and spacer for running with an Emgo short reverse muffler (same as used by Ryca) with minimal baffling, I never had to choke or enrich to start unless the temps were down in the 30's.  I also didn't have all the popping and sputtering associated with warming up.  When the engine started, it ran just fine without waiting to warm up.  I was ready to go immediately (keeping revs down until it warmed up).

I had lots of exhaust grumble as decel revs got closer to idle, but no loud afterfires. However, there were no gunshot sounds on decel, shifting or shutdown.  Occasionally there would be a soft "poof" on shutdown.

I know it was a little rich, but I was still getting 46mpg and bike ran great.  I didn't touch the pilot screw, mainly because when I tried to get the plug out, the screw I was using broke off in the plug.  Since it ran so well, I never pursued getting to the pilot screw.

I wasnt feeling well,, went to the doctor.. he looked me over & told me what to do..
While I was there I thot Id mention a pain Id been having,, I told him
"Doc, when I move like this, it hurts.."

He said dont do that,,