There are two sliders/bushings on each side that are the wear part of the fork. If you're over 50,000 miles or so it's worth replacing those.
Here's the part numbers that Daniel is talking about:
51412-kz3-003 – 2 ea #08 Ring, Back Up
51414-mt7-003 -2 ea #09 Bush, Guide
51415-mch-003 --- 2 ea #10 Bush, Slider
51490-mw0-003 --- 2 ea #21 Seal Set, Fr Fork
91356-kz3-003 --- 2 ea #28 O-Ring
I rebuilt mine right after I bought it as the right side was leaking. Put Progressive forks in her, bought the Honda tool and made the other toll needed out of PVC pipe. Easy-peasy.