Help my Honda suddenly doesn’t run the way she’s supposed to

Hello first time in the round. Have the following problem, last year in September fully motivated me to buy a Honda Shadow VT600 c BJ 1998. The nice thing was an accident vehicle but ran engine without problems. I changed over the winter handlebars 1 to 1. New tires pulled up the fender new wired and the tank repainted in a directly rinsed the tank and fresh fuel filled in. Now I built everything together again and suddenly it no longer jumps on. Ha The carburettor was removed from the carburettor and cleaned up. Then it only ran with a brake ringer as a starting aid but then it turned on but then much too high. So I set the carburettor to standard mixed (completely in and out of three revolutions). However, it did not change anything and reacts to the stand gas screw at all. I then overcome myself and made a test drive as soon as I start it stutters again to normal speed but if I stutter about 3/ 4 Gasgebe and in the 2nd gear the then completely drains off. I am by now really guessless what it could be had before nothing motor technically changed only the tank was down. PS. Petrol arrives, spark plugs look so good and gas train is also free-running, as soon as I put the choke back it goes down very briefly from the speed and then shoots again high I am grateful over every tip.