If you were 16 when you started riding a moped and now want to get on a bigger bike you will need to check your driving licence and make sure that it has Category A Provisional status. If so as long as your CBT is still valid you can ride any bike no larger than 125cc with L Plates but cannot carry a passenger.If you do not have Category A Provisional status then you need to send off your licence to have it added. Remember-when your CBT expires it will need to be renewed to carry on riding.f you were 16 when you started riding a moped and now want to get on a bigger bike you will need to check your driving licence and make sure that it has Category A Provisional status. If so as long as your CBT is still valid you can ride any bike no larger than 125cc with L Plates but cannot carry a passenger.