There no stupid question to begin with.
When i take the truck apart i soak all my bearings in brake cleaner and dry them with compress air after i put some really light oil i buy from my bearing place ,i check each one of them making sure theres not grinding noise if so i replace the defective ones, the bearing on the engine don't need any special care the get lubricated when you run your engine. I always buy the cheap one that good enough for me. For the one way just clean it with break cleaner and put it back i don't oil this one.

smaller CB more torque
bigger CB more top end
smaller spur more top end
bigger spur more torque
(can someone correct me if i'm wrong)