had to take out my primary drive shaft to replace the chains (cam, drive) in my cb500K. the manual said i needed a special tool from honda to drive the shaft out after the circlip was removed. I discovered that a standard spark plug screwed into the opening at the end of the shaft provided enough of an extension that I could tap against the hex head of the plug and, after turning the shaft a 1/4 turn each time, gradually pull the shaft and bearing out of the lower case.
hym