No visa is needed for European citizens and no Carnet de Passage either. However you need to purchase a temporary liability insurance to temporarily import your vehicle. There are several places where you can buy
Citizens of the European Union don’t need a visa for entering Georgia, however you need to buy vehicle insurance as soon as you cross the border. The price for a motorbike is currently about €
The Azerbaijan land borders are still closed for tourism (last update july 24, 2023 on Caravanistan) But you can fly in. Armenia and Azerbaijan have been in a conflict about the Nagorno-Karabakh region for years.
Turkmenistan transit visas aren’t being issued since covid. You can apply for a tourist visa (prices uncertain, on source stated $85), but you’ll have to book a tour and be accompanied by a guide.
To enter Thailand with your own vehicle, you may need to contact the Department of land Transport in Thailand at least 30 days before your planned entry. Source: ADAC 15-05-2023