How do I transfer motorcycle license plates from Pattaya to Bangkok?

If you don't change your address on your registration.. then a problem could arise if a fixed penalty notice.. say for speeding or some other driving infringement.. gets sent to your old address and it is returned to the police.. you should also consider that any insurance you have could be invalidated.. since your address is a factor in the premium calculation and the price could change if you move residence.. so witholding a change of address could be considered a material variation to the contract of insurance.. leaving you uninsured if you have an accident.. however, once you notify the DLT in your old province of a change of address to another province.. they will normally give you 7-14 days to go to the DLT in your new province to re-register it there.. meaning you don't have a choice in the matter.. and failure to do so at that point will result in a fine.. i would suggest it is advisable to simply re-register a vehicle in the new province in all such cases.. so as to avoid creating problems for yourself later.. it will also make it easier to sell it later on.. since potential local buyers could be deterred if they see it is registered in a distant province!