Looking for clarification on SCORE Sportsman "Over" and Sportsman "Under" classification rules. I have looked at the SCORE 2006-2010 Rule Book, but it mainly covers the Pro Classes. I guess my question is..... Is the over/under referring to over/under 250cc or over/under 450cc? Is it like Class 21(450cc or smaller) and Class 22(251cc or greater).......... Meaning a 450 can race either class? Or like Class 20(250cc or smaller) and Class 22(251cc or greater)...... Our main race bike, a 450x backed out, now we are looking running the old tried and true WR426. That's what got me thinking about the displacement numbers. As always thanks for the help and see you down there.