First: first make sure your motorcycle is out of gas?
Two: make sure there is gasoline. If electricity doesn't catch fire, try to light a torch with your feet.
Three: if it still doesn't catch fire, the ignition nozzle may have carbon or water, which needs to be disassembled and cleaned; Then install it and rekindle it. If it doesn't work, it will have to be replaced.
If the above three points can't be solved, you can only find experienced maintenance personnel to deal with them!