I keep adding to this post.
Lately I've taken to reading the SuperMotard sites. I hate to admitt it. But in some areas those guys have a lot of experience. They are riding their bikes on the street all the time. They ride them hard. They are also ahead of us as far as converting dirtbikes into medium haul street/dirt bikes.
Since I am now a berger fan I will offer links to two great sites.
I like this one the best.