If there are no sparks at any of the plugs I doubt that new plugs will help. As previously said, make sure the run button is on. I would then try and eliminate one of the 2 main components to make it run (Petrol and spark) so providing it turns over I would either get some quick start and , removing the air filter, spray some into the airbox towards to engine and try and start the bike, or, take the plugs out and pour a little fuel down the bore replace the plugs and see if it starts. If you get a combustion noise it will probably be some kind of fuel problem. If you don't get a combustion noise then I would check for a spark on each cylinder. If there Is no spark I would seek further help.
Good luck.