I was told yesterday that Yamaha is only going to replace them once, cause your suppose to take them apart and grease them up. Mine are all shot, I have about 8500-9000kms on my 09, so did good I guess compaired to some others, I guess I really didn't notice or check them until lately, that's why. Figured I'd put a new set on now and by the end of next year get them done again at the end of the 3 yr warranty. Guess that won't be the case with some dealers. exhaust gaskets gone also, same as the Apex except the y-pipe seems to be made out of heavier material. Didn't break like the Apex did.