Basenji.
The bearings you are talking about are tapered bearings and they may just need adjustment. If you remove the steering stem from the frame, you can inspect these bearings and most likely just grease them and re-assemble them.
If they have to be removed, the hardest bearing to get off is the one at the bottom of the stem. If you put the stem, upside down in a vice, you can take a slender chisel in between the triple tree and the bearing, (in the lower seal area), and carefully tap the bearing down. Tap lightly while going back and forth around the bearing so it doesn't bind on the shaft. It doesn't matter if you ruin the bearing and seal since you will be replacing them anyway, but, be careful not to damage the aluminum triple tree or the stem.
Using a piece of pipe with an inside diameter a little bigger than the stem, you can drive the new bearing back on. Don't forget to put the seal on first and then drive the new bearing down tight. Make sure the piece of pipe only contacts the inside race and not the bearing cage.
Removing the outer bearing races from the frame can be done with a long punch and a hammer. Use the same proceedure by tapping the bearing race back and forth from side to side as to not bind it in the frame.
Reverse the proceedure to install the new outer races, but, be careful not to slip and damage the bearing surface of the race. Tap them into the frame until you feel them bottom solidly in the frame. Grease the bearings using a good waterproof grease and re-assemble.
I hope this makes sense, it's early and I've only had one cup of coffee.:confused: