I finally got the bike running great (an occasionally pop here and there).
Yes, it is popping but I can live with it, I think I have to play with the pilot screw just like Lancer suggested in his posting related to tuning the carb.
I did replace the white spacer with the three (3) washers and the popping that occurred every time I shifted disappeared. I left the Main at 150 and the Pilot at 52.5 (stock) also got a K&N filter (6595) to replace the stock filter (in the air box). The bike is running great, has lots of power, lots of response, and very, very smooth.
Since the only mod left for me to do was to replace the white spacer I choose to do it from the top without removing the carb (just for the heck of it). Personally, I prefer to take the carb but since I am still learning about the bike I thought I will give it a try. The only thing I would recommend (optional) is to replace the screws on top of the carb that hold the cover for the slide and its components. I got some hex steel screws and that work perfect (next time I need to take them out). See picture below.
So I’m up and running, I am a happy camper, or should I say “a Happy Biker”
Thanks for all your help and suggestions; they “all” are welcome.Stay safe,
Qwapy