Did you make sure that there is fuel to the carb? Unplug it at the pipe and blow on it and make sure you see fuel travel through your lines and to the carb. Double check that the glow plug is good and that your igniter is fully charged and that the piston is at bottom before you try to start it. Take your filter off and check that you have 1-1.5mm gap in your carb at neutral...you can also get another person to give it some throttle while you're trying to start it. You might want to also double check that the needles are at "factory settings" and maybe lean it out a tad since factory is usually super rich. Good luck