Unfortunately, it may depend on what year and month your bike was manufactured as to what front tire will fit on it.
Before a certain serial number before I think in 1964 the bikes had front forks that were 3/8" narrower with different front fender brackets etc.. So the widest tire that might fit on an early bike, like one old 650 I had, was a 3.25-19, or in modern size a 90/90-19. And then I remember I even had to make sure the bolt heads for the fender stays had their heads in not out. Not the most attractive thing, but then as now I was a lot more interested in functionality and safety than having a show-bike.....