Sue, I think on the rear wheel, it is just good not to have too much on either side. I have always put some on the drive side, so... (but I am NOT the last word on airhead maint. by ANY means!)
What Semper is referring to, is, when you lube the input shaft on the transmission, DO NOT put any lube on the mating splines on the center of the clutch. (DO clean it, though) Grease applied there can be pushed forward, and may get on the clutch plate.
Also, while in the clutch, put a small dab on the tip of the throwout rod.