Give Cogent Dynamics a call. They have springs and expertise....you'll be happy you did!
It is a 2011 and, with just me and a water bladder, I'd say it's around 215 lbs. I don't haul much more than that. Except maybe a gym bag when I'm commuting.I get my fork seals from my Kawi dealer. Yes, now is the time for suspension upgrades if you are considering them; what year KLR? what's your loaded weight? how do you find the current setup? ...have you ever checked or set the sag?