Are you letting the bike warm up thoroughly before you ride off?

 

Those look like the Cometic gaskets for the Twin Cam. The ones for the Evo have the rivet sat closer inside and I can assure you when I tried to fit them they caused clearance issues.

 

The instructions say to cut the rivets off if they do not clear. I had to do that on my Shovelhead, and they were much close to the head gasket mating area than the ones pictured. I have had zero problems since the rebuild with cut off Cometic rivets.

 

One tap with a tinning hammer