Now then, attention please!... Right, here is the voice of reason, pay attention at the back. The reg number plate is really only governed by the size of the letters, if you keep the letters at legal size then you can adjust the main plate to a smaller size, within reason, the easiest way out of this problem is don't mess with the plate at all, it's not really that bad is it? not only that, if you are pulled over, it's just another excuse for pc plod to pull your bike to bits, I've learnt over the years old pc plod like nothing more than to pull young chaps over and strip the freedom of you bit by bit, points here and there, small fines, trouble is points mess your insurance quote about, it's not really that "uncool", and infact ordinary joe public never ever pays any attention to what size your rego is, but police do, it's they're bread and butter. If you really want a postage stamp sized plate, carry a standard one under your seat and as for l-plates, carry a couple of those with you too, or pass your bike test. Don't be a magnet for the police....right...carry on