ok. the rear hub is yamaha XT600EE, 89 up to end of production, I had a 93 and my bro just sent it to the scrap heap
the front may be yamaha, but I am not sure..
BTW, if you ever need drive rubbers or a new sprocket carrier, available at yamaha, $6.00 for the rubbers, $95.00 for the carrier (mine rattled the bolts out from too many wheelies and backing it in EVERYWHERE!!)