How much fork travel are you using?
With 5.9 inches available I am only using about 4.5 inches. And this is after I changed fork oil from 10w to 7.5w, dropped oil height from 75mm right 65mm left to about 90mm right 80mm left, set rider sag at 41mm, with stock fork springs. Bike now has about 740 miles on odo and forks should continue to loosen up.
So what does it take to be using more of the 5.9 inches other than riding faster. I may even consider trying 5w. I also have rear shock set at full soft and bike is working better than when all stock but is still harsh on sharp hits.
2004 Hon XR250
2004 Kawi KDX220
2006 Suzi DL1000
2009 Suzi DR650
2011 Kawi 650 Versys