There are some truly memorable names from flat track's history, but I've just come across my new favourite while researching a future story.
I present 1971-72 national number 28 - Royal Sherbet.
That's him above, on a BSA Twin, battling with David Aldana (3) and, I think, John Weaver (52); Gene Romero (the 1971 #1), Jody Nicholas (23). I'm pretty sure the other obscured rider is Chuck Palmgren.