I had that happen to mine a couple years. Called my tech at the Doo dealer. He said from sitting the fuel evaporates and you just need to "prime it", so to speak..
FIX: slide out the air box, put some gas in a spray bottle and spray into both intakes and it'll fire up.
Pull the plugs and just put a little fuel in the cylinder, plugs back in and attempt to start it. If it fires or pops, you know its not electrical. This will be a little quicker than pulling the air box. Both methods will work the same.
