Make sure to get an IDP International Driving Permit for your home country drivers license. If you plan
on driving car and motorcycle get both on the IDP. I’m US you can get from AAA easily.
I’ve not heard / or looked for big bike rentals in Isaan. Chiang Mai has great big bike rides/rentals well
worth visiting. You’d need about 1 week to go on the golden triangle loop.. some 10 days. Good rental prices and you can ask for suggestions for hotels on the route which were very inexpensive, clean, safe. Three of use went on self tour but you can choose a group ride.
Some rental gear .. jacket, gloves, helmet….. pack light … bring your own boots/shoes… well worth the trip go up through the hills tribes… awesome … and weather was great… rental shop suggested shutting down late afternoon and you mis the showers most the time.. Enjoy and post pictures if you go..