The classes are not strict. At highpoint the classes were 12" open and 10" open/stagered with 12" production (12" production is like the stock 110 class). they weren't real particular on the rules. some guy raced willy brownings bike in the 12" production class and they didn't care. There were people riding big wheel playbikes and one guy on a kx60 2smoke. It's all for fun. I don't even know if they give out trophies. I got 4th at the last one but i didn't check.
i was going to race redbud but the guy i go with who is pro isn't racing