So last year I came on here asking a couple questions and everything was going fine this summer. I would start and run the sled every 2 week and got it up to temperature then shut it off. I just had the carbs rebuilt before i rode it last winter. Now when I went to start the sled for the first time this winter it started when I primed it a couple times and then it would idle for a couple seconds then die. I then checked the plugs and put new plugs in just incase (also checked the spark it was good obviously because it ran) then I took both fuel lines off the carbs and they where squirting out fuel. So I took the carbs off and cleaned the passages I didn't take the bowls off though. Then I put them back on and it was still only running of the primer shots. I'm not sure what to do it was just running fine last winter and summer. And also the fuel pump was just rebuilt. Any ideas what the problem could be?