OK I hope someone can help me.. I currently bought my first bike not knowing much at the time I bought it... But it's a 200x auto x with the 200s motor I had the gaskets valve seals and piston and rings put in.i tore down the entire bike to paint and clean it up a little the header was a mess it leaked in 3 spots so I bought dg exhaust ND header for it cause that's all I could find I put everything back together and couldn't get it started so I ordered a mikuni carb for 30$ on eBay.. I don't have any experience with fixing bikes but I have tools and I'm not afraid to dive in. I'm like a professional with these pull starters considering I took it apart and rebuilt it 10 times.. OK I have a nice blue spark. I have good compression.. So now I push it throw it in gear it starts but then dies after about 20 or 30 seconds and I'm trying to keep it running.. In 1st gear it felt like it had no power.. It wasn't chocked so I pulled the spark plug and noticed it was black not wet but like a dry sooty black so I did my research and people on here say to rich but it's acting like its not getting enough fuel... Anything at this point will help ..I am stuck !!!!