This shows how to do it on a cb360.
here is my blog link...also a couple of these pics were donated to the cause. by Frogman himself.
http://www.hondabrat.com/2012/08/rotor-starter-replacement.html
run a phillips screw driver through the hole in the axel and give it a tap or two to the right, (righty tighty) the added pressure of tightening will pop the thing off easy. (easy peasy) It is simply held on by the wedging action of the famous morse taper. In theory once it is pressed (torqued) into place. The bolt really does nothing and in a perfect world you could remove the bolt entirely and the thing would get along just fine, relying on the magic of the morse taper fit. We dont live in a perfect world. thus the bolt stays.
Turnturtle is also correct. there is a key twixed the shaft and rotor. this is how it keeps things aligned. Otherwise your timing marks will never be right again. You will find key once rotor is removed. DO NOT LOSE IT OR FORGET TO REPLACE IT UPON REASSEMBLY.
Absolutely do not tap on the rotor itself, the thing is chock full of magnets. Shock, such as a hammer blow may cause them to lose their magnetism. Thus your charging system will no longer make go go juice.
I used a magnet to remove the valve keeper things, at some point during my rebuild my magnet may have gotten stuck to the rotor. Magnets stick to lots of things when your busy with other things. I believe this is what may have caused my rotor to go sour.