I run 30wt in my C & J Honda, remove springs with the forks extended to max fill to just cover the spring seat, you will need to pump the forks a bit to get the level correct and all the air out.
They do work very well, when I 1st built the bike I had 20wt but found that the dampering degraid as the race when on, 30wt feels to heavy to start with but once it warms up they work prefectly. Do you know what the year forks are from and do they have the auto air bleed top caps?