Stator=No Spark

I have a 250 recon and i tried 3 different coils on it and I got no spark. My initial thought was the Stator. I have tried 2 different cdi boxes and I also thought of the regulator/rectifier. Can anyone tell me what might be the problem why i am not getting spark. I have downloaded the service and repair manual to get help. Any additional help I can get will help.