socket + vice works well. you will need a big 'receiver socket' to catch the old bearings. be careful with alignment when you press the new ones in. assembly lube, and finish with lots of waterproof grease is recommended. this job is lots easier with 2 people, as fumbling with socket alignment while holding swingarm square and turning the vice handle into position is tough alone. once you get the old bearing preloaded it'll move easy. that first twist of the vice is always a little unnerving.. keep in mind, to slowly set the depth of the new ones, if you go to far, it can be very hard (if not impossible to do without damaging the cages) on the bearings pushing them back out.. once you get one done you'll pop the others in pretty quickly..