On alluminum swingarms, you should check your aduster bolts for rust, and add a touch of oil to them to keep them from rusting up too badly. Water can get inside your swingarm, especially if any of the hugger or chainguard bolts is missing. If your adjuster bolts get really rusted, it will strip out the threaded bosses in your swingarm. FYI.
Very good suggestion because I have run into this and had to deal with the headache of broken and siezed adjusters. I used anti-sieze instead. Made a little more sense than oil to me.