the rules are statin that you will need to ride a 125cc but it has been worked so anyone in b youth on a 250 at the moment will continue to do so thats what mags our club secetary said so if you have a 250 and you are b class you will still be able to ride it next year.i would have to agrre wi pete that a 125 is an alright wi bike if it is ridden right and will do most things a 250 will.ishy proved that and yes pete it was a sherco