Well, finally achieved success! Thanks, all, for the tips. After removing the throttle shafts and seals I then heated the area up good and hot with a heat gun. Was then able to use a push pin and hold it with a pair of pliers, and then used a 1" bar to get good perpendicular leverage. Didn't take much force and the tips popped out. You guys were right....heat is the way to go. I couldn't figure out how cooling these in the refrigerator would help, given what Gary said re the rate of expansion between both metals. Pics attached in the event they help if anyone else runs into this issue. Now, time to order new shaft seals and pilot screws, etc. Will see if I can get this XS1100 running and determine if it's worth restoring. Will post up other pics soon. Thanks again everyone! Love this forum.