I have a couple of modifications to do yet. I'm friends with members Paper & double A & last week they helped another rider major lagg replace the doohicky on his bike (was acutally broken). I ordered parts to do the doohicky for myself and two other riders and double A ordered bolts to do a sub-frame upgrade on a few bikes like mine.
I use the KLR for all of my 2 up riding too. My girlfriend has more fun riding on that than my Honda. I think the sub-frame upgrade would be a good idea too with the amount of 2 up riding I do.
The KLR is a blast.