Hi rollo,
I have always been able to get them off with my puller using a 6 ton jack except one on a Honda 6 months ago. The motor was good so I ended up having to change the plans for it. Now I had these 2 and all have been steel bosses and they have rusted solid to the shaft. What completely blew me away was the fact that the Chondas are using 7/8th shafts not 22mm as Honda does