Like I said, they're idiots. There's no way they're using AMA Pro Rulebooks. Either way, a 250 2-stroke is only meant for the 450 class, since this is what it was designed for, regardless if it's 300cc. A 250 would be eligible for the 250F class if amatuer rules were allowed, but this is not the class it was originally intended for. If Yamaha is involved, then I'm pretty sure they would be briefed on the rules for the local racing CRA. Of course when you deal with bozos, they don't understand logic and common sense.