Remove the left chrome cover below the seat and adjust the nitrogen cartridge. It is listed in your owners manual and the direction to turn the adjuster is posted on the cartridge side.
Rich K (Rune Ski )
I have done several adjustments to the damping and can't find a setting that's really soft and not to bouncy. I'm 240+ with riding gear and I find it to be to sharp on rebound. What I think the bike needs a spring pretension adjustment, unfortunately I haven't found a suspension company that is willing to make a new rear shock for such a limited production bike.
My wife & I together are about 335. I have mine turned up all the way to as stiff as it will get. it is extreemley soooth when we are both ridding but still havn't found that sweet spot for just me alone.
I've adjusted mine all the way to the softest setting. I'm 195 lbs and I wanted it as smooth as I could. Since I'm not riding with a passenger and I'm not a super big guy, I keep the tire pressures at 41 front and 41 back and the suspension at soft. It works for me. 8)
I haven't noticed a lot of floating beyond anything that I feel comfortable with when it's set on the soft suspension I've been on pretty smooth roads and the beast is so heavy that I haven't concentrated on the difference to much. I've only taken her on beauty rides and not daily commuter stuff. I did take one strange corner a little quick and scaped the acorn once after I changed the setting. I wasn't sure if that had to do with the bike being more soft and dipping down easier during a hard corner or my still getting use to a crusier vs my CBR 600 and how hard I can lean/corner it. Sorry I don't have more experience on it yet.