Roller Don’t jump to Yamaha zest 50

Hello A question and that my scooter doesn’t start any more since he banged when he had a wrong ignition and the speed went down and didn’t take any more gas until he went out and that’s it! since he doesn’t jump any more! I’ve already switched the diaphragm changed the air filter myself cylinder and piston exchanged says nothing I’m with my Latin at the end please help me Ps Zündfunke is there! Please help me!