Have a look at this table of settings, it may be of some help.
http://www.zggtr.org/MGalleryItem.php?id=496
I have been going over this again, and see that the settings for front for preload is given as, "from all the way out." That can't be right based on the manual. The manual shows an adjustment range of 4mm~19mm, and that range is measured as the amount showing, not from all the way out. So, the chart shows the standard setting for a 150 Lb rider as 15 mm from all the way out, so that would then be 4 mm showing based on the adjustment range of 4 mm ~ 19 mm. That makes no sense since the standard setting is 14 mm showing. I guess you must be able to run the adjuster out farther than the acceptable range.
I have been on bikes for over 30 years and I have never seen a value for preload given as all the way out for the type of adjusters we have on the C14, it is always given as lines showing or a measurement of what is showing.
To get a value of 14 mm showing based on 15 mm from all the way out as the chart says, you would have to be able to run the adjuster all the way out to 29 mm showing.
I also see that the poster of the chart shows that he felt it best when set at 14 mm from all the way out and 3 clicks from all the way in. So the fork preload would be softer but it would have more rebound damping. While I can believe that may be the case, I do find it questionable.
Mine is currently set at 12.7 mm showing I weight in at 160-165 depending on the day, and my wife is all of maybe 115. I was planning on increasing preload a bit today. The bike handles well but is harsh at times over the bumps. I cannot tell if this is because the preload it too high or if I am bottoming out. I will experiment more today.