HELP Preadator with dyno cam AND NOW HAS CRAZY COMPRESSION!!!

I installed a dyno cam inst my preadator and it has crazy compression. Almost pulled shoulder out trying to start it. I tried lashing valve and didnt work. I have ordered 18lbs springs. Only mod I have is header. WHAT IS THE PROBLEM? HOW CAN I LOWER COMPRESSION SO THAT I CAN START IT?
sounds like the compression release may not be working or like these guys said check the lash and check it again. I have a bike that's 14.1 and it pull starts very easy.