Oh, that race Derbi? I just rode with a Derbi this weekend that gps'd around 64. I wouldn't be suprised if one could do 72. Vic's (the one out this weekend) was rocking a 15:15 carb.
Also, Matt, were I going to do Bonerville, which I wouldn't, because I'm slow and lazy, I'd go one year, and spend a month testing and tuning in the area, and then I'd go back the next year with everything I had learned. But what the fuck do I know?