No 2 Strokes allowed!
Lame!!
Joe
Yeah I hear you, I don't know where that came from other than lots of Enduro riders slap a plate on and call it good.
If the bike (2 or 4 stroke) has legitimate credentials and State Inspection I think they should be allowed. Look at all the street legal "enduro" bikes that were two strokes back in the seventies and eighties.
The only limiting factor would be the 75 mile between gas availables that some two strokes could not make.