My thoughts are that if there was enough interest, it could be a "feeder" class for vintage, where the only prerequesite be that its a 100cc, from MX100 to YZ100 all models, RM100A/B/C/N/T/X, and any sleeved down cr125m's ? I raced a RM100T when it was a current model, as i was too tall to ride a 80cc comfortably, and had a ball on it.