Tracking Down Maggie
The vehicle details for J779 CYK are: Date of Liability 01 09 1995 Date of First Registration 01 09 1991 Year of Manufacture 1991 Cylinder Capacity (cc) 780cc Fuel Type PETROL Vehicle Status Unlicensed Vehicle Colour WHITE Should be a K 75 RT but the displacement is wrong. I don't think there was any BMW motorcycle with 780cc though.
I'll list it as that then. Must be a DVLA error unless the police bored it out.