RM,
They don't come with them but can be installed. I put them in my 93 KX250 back in the day but was a PITA to get to the Zerks, also had to remove set screws in the swingarm pivot to install the zerk fittings remove the chain slider to get to the set screws, so you can see it was just as easy to remove the linkage & swingarm. There was a company about 15 or so years ago that made the linkage bolts with zerks installed, but were a bit pricey.
DoldGuy