1997 kx100 water pump help

when I took off my side cover to replace my clutch plates I noticed balls from a ball bearing and it was from the bearing that the water pump sits in next to the primary gear, I need help finding it I cant find it in any diagrams and i'm not sure what its called could anyone help me? I'll put some pictures of where the bearing goes but since the bearing was destroyed I can't show a picture of it.