Make sure you give it a little throttle, it could be the idle safety switch. If it starts with a little throttle, but dies on idle that is your prob.

 

talked to a polaris tech today and he told me what it was i tried it and it is running now. if anyone else has this problem check the carb to intake boot if they spit through the carb it pushes the carb out enough to suck air and it wont start. thanks for all the help guys.