The motorbikes are located in Northern California and seem to both be 250 cc's, I'll find out for sure and get back to you. Sure are nice considering the age and that they were ridden not just museum pieces.Cemoto is the company, Pursang is the model, they are full on go fast MX bikes, likely with a close ration gearbox.
Cool! Not many people have the balls to ride them any more.
What's the displacement? Yellow # plate is likely 360cc Green # Plate likely 250cc