Our suspension experiements are works in progress that may not represent anything near final settings. They are, ofcourse, also subject to rider weight, application, ability, and preference. These riders are approximately 175 lbs without gear. I do not think the 05 Honda 450 forks are very far off, especially when compared to other brands and disassembly of some units from well respected prep shops. My fork suggestions at this point would start with plenty of break in and oil replacement, proper springs for your weight, and 3 to 5mm less preload. We accomplished this by using cartridge spring stops from 02 stock units. We are carefully experiementing with small shim changes and even the controversial ICS springs. ( We've had very good results in the past leaving the stiff stockers in place )
Be sure not to fall into the trap of backing compression way out and turning rebound way in.
Marcus and a few others on this site can no doubt give some good suggestions as you sort things out.