This has been my goal for about, ohhhh 6 years now. LOL! I have wanted to do an enduro/dual sport on a XR100. I have one now that I think is ready, I just haven't done it yet. I have YZ85 suspension, wheels and brakes, BBR120, frame cradle, wide pegs and some other small things. I think it would be sooooo fun!
I strongly suggest trying to fit some wide pegs before the race. I fit some off of an older CR125. The Stock 125 pegs are wider and beefier than the XR80 pegs. It would suck to end your race early because of a peg that got ripped off or smashed. The smash pretty easy on enduro terrain. I rode at Highland Park there in Georgia a few years back. Pretty cool place.
Good luck and report back!
Edit: I just seen the pic of your bike and noticed the pegs. LOL! Good job! Your bike looks killer! Where did you find that #9 at? I'd like to get some numbers like that. What size bars you have on there?