1)make sure the plugs are good 2) try and make shur you're not flooding it 3) take a gas sample by draining the carbs and put the gas in a clear jar and let sit for a couple of minutes, if you see a separation in the liquid there is probably water in the gas 4) put a timing light on the #1 cylinder and find your timing marks and have someone pull it over while you check the timing 5) undo the exhaust from the headpipe and make shur Mr. Mouse didn't build a nest in your exhaust, or that the pipe isn't carboned shut. But try to temporarily start the sled with the pipe undone but if it fires shut it off and check for exhaust restrictions 6) Unplug kill switch and see if it will start and run.(Most sleds will run with the kill switch unplugged) 7) last but not least if all else fails have the dealer check the coils and the stator......Hope these help but this is what I would do for checking out the problem.....Steve
Sno-nuts has pretty much got it all said, but don't forget the basics. Check your compression, and do a spark test. If you've been firing it up and idling alot it may just be loaded with fuel.
Being an EFI model make sure any ground wires are clean and tight.
Wife 08 Vector
Son 2012 Nytro XTX