I just checked the service manual, and it does say 93mm from the top. I find that to be a bit excessive. Honda states to put 14.0 +/- 0.08 fl.oz into the forks, bleed them (you slowly pull up and push down on the damping rod to prevent cavitation in the fluid), and then suck out any excess so that you are left with a level of 93mm from top.
Are you going to be leaving the oil lock valves intact? If so, I'd go with what the manual states. If you'll be removing or modifying them to be inop, I'd set it at 100mm from top and change up or down in increments of 5mm depending on the feeling you're getting.
The airspace in the fork tubes acts like an air spring. As the fork compresses, the air space gets smaller, building air pressure. Less air space (ex. 90mm from top) offers more bottoming resistance, while more air space (ex. 110mm from top) offers less.
How much do you weight, riding style (do you like the front soft or stiff), tire sidewall stiffness, track or street & skill level. Doing anything else fork wise like new valving or springs?
Last edited by Demented; 07-08-2010 at 07:03 PM.