I just spray the bushings once in a while with lithium...Amazing thing is I have 2200 miles on the Honda without grease fittings and all bushings are tight...had a RZR with 17 grease fittings if I remember right, and had to change all the bushings AND bearings by this time...Honda must be doing something right 
I don't know about the 500's but the 700s use a spray marine lube ,I found the info on the lube points and required lube in the owners manual
