Do you mean a Carnet (Carnet de Passages en Douane ?? The CPD) as it is non trivial.
Unfortunately Thailand is not a signatory to the CPD system, as such they cannot / will not issue a CPD here. IF you can get a 'bike passport' the international travel document and romanized version of the Thai license plate a contact in the UK will issue a carnet on a Thai bike as long as the plate is romanized, they wont do so on a Thai scripted plate. Of course you still have to pay for the CPD and leave the bond as with any issuer.
I am unsure if the romanized plates from the Malay border that you can get would be suitable, I suspect they would be in a pinch, as the international bike transport book is now very hard (impossible ??) to get. Next time I go to the DMV here I will talk to the contact I have whose great with me and see if she thinks the international book is obtainable anymore. I am sure some of the posters on here know much more on that.
Thanks for your reply. Yes I do mean a Carnet de Passages en Douane, any further information on a 'bike passport' would be welcome. I do know the UK contact so I will also contact them for more information.
You may want to contact Peter username Beddhist as I discussed this subject with him and sent him the UK contact info when I sussed they would issue them on a Thai bike. As he has departed towards NZ with his GF on a Thai registered machine I have to assume he succeeded in this.
There was a Carnet thread you could search out on here.