i use the handle to my floor jack... and bang on the end with a weighted mallet in circles around bearing untill they pop out
if you dont change them often enough, they can be a whore to get out
to get new ones in, i know alot of people sa to put the bearings in the freezer to shrink them, ive never tried it, never had any problems, just make sure the inside of the carrier is clean and u got the bearing races out (if they were exploded) and greese it all up good and they should tap right in, use a chunk of a 2x4 or somethin and tap on it with a mallet, never force them in
wouldngt be a bad idea to do the swingarm bearings too while its apart and ur working on it, those and the axle bearings go pretty quick