rear wheel bearings

Hi all, I started my xs last night just to warm it up for a couple of minutes. It stayed in neutral the whole time. Turned the engine off and moved it backwards to park it again... The rear wheel wouldn't move anymore and I noticed that the clutch lever had become really hard to activate. And...

Well, seems like I have allot of play in my rear wheel bearing on the ol xs. I have a rear mag drum brake wheel, anybody know what bearings I'm going to need to order up?