My axle was stuck when I attempted to take it out this spring on my GS750. I don't know about HD axles but jap axles have a hole going down through the axle end, I took a slide hammer like so...

Took a piece of an old broken screw driver, bent it into a "L" shape and welded it to a nut that fit on the end of the slide hammer. Then proceeded to beat on it until it came out. Once it started to move it came out fairly easily.
When you finally get it out use this when you replace it.....

After that headache I will not forget again.