"Anything will do"is the wrong way to look at it. The bike was equipped with what the factory thought was the best choice for it. In order to maintain the original desired ride, you should look for a tire of similar characteristics. In your case, a two ply with directional, "knobby" style tread. If you were just building a "rider" it might not mean as much. But you say you are going for a "full face lift". Go for the whole thing.