The springs in the forks are a bit on the soft side. The rear shock spring is way too hard. If you ride with a passenger, it works pretty well, because that's what the bike is set up for. If you ride solo, it needs some work.
I totally agree with you! My front shocks seem way to soft, especially when I stop. It dives way to much! But the rear shock is way too hard. In fact, when I took my bike in to the dealer to get my first 600 mile service, I had them stiffen the front and soften the rear.
As for "spring rate", I may sound brain dead (it's the Coronas every night) but I don't really know what that technical term means.
But I can tell you THIS for certain...
In the Honda Service Manual for the 919, it says this:
Front axle travel: 109mm (4.3 inches)
Spring free length: 282.3mm (11.1 inches)
Not sure what exactly help if any those numbers are, but all I know is I'm going to follow this thread to the end because I keep wondering about getting a stiffer front spring set.