What I miss most about the "old" AMA road racing is the original formula extreme class where it was kind of an unlimited - open class. In fact, I recently saw one of Kurtis Roberts CBR900RR erion FMX bikes for sale. Those bikes were ridiculous, if memory serves they were making well over 200hp in the days when 750cc superbikes made 175hp. There was even a shortened hyabusa that raced in that class, he caught other riders on the straights but lost them in the corners. There is a dude on the east coast whose collection includes a Jake Zemke piloted FMX CBR954RR.