What a crack up! I could read those guys thoughts. "I've got an insane rider on a ton of metal closing on me, maybe I just let him go by and watch the carnage from a distance." I've never seen so many guys take a look over there shoulder during a race.
Knobbies and no rim locks? I'd say you need to get two rimlocks and go up to a 130 or 140 knob on the rear.
"Dad, can I get a motorcycle when I grow up?"
"Son, you can't do both"