10:1 odds it's flooded and the airbox just made it a tad bit harder to get enough air to combust. Pull the carbs and clean them. Change the plugs too. Then just let it sit for a few hours and try again.
1996 Arctic cat ZR 580- 6 inch risers, C+A powder skis, 99 ZR's front suspension, freshly rebuilt engine
1992 Ski doo mach 1 617cc (the beast)
Die hard polaris anti-fanatic!
Do the snow dance with me!!! We don't get enough in Vermont!
And God said: "Let there be snow."