Another "trick" I forgot to mention earlier. Is to first mount the tire [with] a tube in it, let it sit [inflated] for a day or two so the tire can seat. Then break down just one side, remove the tube, add a bit of proper lube & immediately re-inflate.
What did you use for a valve stem?
However, mine wouldn't seat even with a tube. Blew out 3 tubes before i gave up and purchased the Dunlop and new tube at a dealer and let them install.