Peugeot Speedfight 3 AC does not jump anymore

Hello together, first of all, I’m Laie and have done only minor repairs on 2 different scooters so please have a little indulgence if I did something wrong ?? So to the problem: I have a Speedfight 3 AC (20.000km ??) at which about 1 month ago the drive belt is torn, at the time it ran problemless, the belt is torn at approx. 35km/h, the engine continued running, I then pushed it to the parking lot and tested again, if it still starts, the Two weeks ago I brought him to my workshop, but he didn’t jump any more, belts changed, installed a new clutch + bell directly on the occasion. Since he was only started by kickstarter, new battery installed, still doesn’t start. Carburettor cleaned and needle checked, since in the meantime there was a fuel mixture in the air filter and new spark plug installed, still nothing, spark is available. Unfortunately, I don’t know what it was like. Now it can still be because he still doesn’t start, would be great if someone had ideas.