Do not use the bladders with the bleeder caps. If you want to try bladders, you need to use these caps.
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I've been using this setup for a while, I like it. One thing I learned is to go 5wt LIGHTER with the oil when using bladders. Since the air is not mixing with the oil in this set up, the use of lighter oil is necessary to achieve the same results.
Just fill the shock until the oil is just past the hex shaped part of the shock body.
Push the shock shaft about 3/4 of the way in.
Place the bladder on top of the shock body, being careful not to trap any air under the bladder. The whole point of the bladder is to keep the air from mixing with the oil.
Place the black cap on top of the bladder, then screw on the blue retainer. Be sure to keep the black cap in place while screwing down the blue retainer.
Check the rebound on the shock, and you should be good to go.