Originally Posted by
tc5 man
i dump out the old shock oil, and clean out the shock body with simple green or something else. you want to make sure, there is no dirt at all in the shock body.
Dump the old oil, fill it with new unless you want to change the o rings. I clean the o rings every other time I refill the shocks just to clean everything up, but for the most part if you get all the old oil out there will be air bubbles at the bottom below the piston. So I leave a little in there.