Thanks MP,
The cases and trans are both from and 86. The countershaft has the nut for the sprocket.
I have 2 1986 motors, so I have been playing around with fit of different countershafts and different case halves. Which frustrates me when a completely different case half locks the shaft as well.
Still haven't tried using my other right case yet because I hadn't had any welding done there, but that might be a place to check as well.
I just replaced all the bearings with new oem parts except the crank bearings which were from Wiseco, but they still say Koyo with the same numbers printed on the bearing as what came stock, and new seals. Yesterday I rechecked all the bearings as well.