That old zzr had about 4 grease nipples under the linkages, I'd only owned if for a few months when I noticed a bit of a 'clunk' in the rear. Up on the center stand It was obvious the swing arm bearings were dicky. I pulled it out and it was dry as a bone inside, two sets of needle bearings and a roller bearing, stuffed! It had never been pumped full of grease and what was there from the factory was minimum. I got the hayabusa and went looking for the nipples and it had none? Modern sealed bearings. I was a bit skeptical at first but they seem to hold up. Anyone ever had an issue with them?