Kymco agility 50 4T does not pull when it is warm

Hello I had my agility 50 one set for inspection or carburetor, valves set as well as the compression test. After the inspection I drove a maximum of 40KM and then the scooter stood for about longer. I wanted to drive again the days after he jumped hard he pulled the first 500m well as long as the engine is still completely cold, as soon as the engine gets a little warm he loses power(so the warmer the engine gets the less power he has) and d has both detonators. can anyone help me what that could be? Mixing screw? carburettor too? Cdi ? Had also the e choke completely exchanged and measured: (directly on the plug to the e Choke) I have AC11.22 Vand DC 843v The battery brings its 12V and if the engine runs with the receiver it has its 14.36V And I had made again the old bezinfilter pure then the detonators or power loss were not so early Thanks in the presupplied mfg sven