What about an ex pro (retired) class at selected rounds? Short moto's, run what you want. All for fun. I'm imagining a race with Jeff Ward, RC4 and Pastrana. Guy Cooper shows up with a 600+ cc thumper and scores the holeshot award. I'd pay money to watch this.
The older you are, the more points you score, or something to that effect.
A man can dream. And this is a good dream.