From my knowledge, the so called compulsory motorbike insurance is more or less fixed to the motorbike, even your name is in the policy. It covers the driving person as well as 1 passenger. The insurance even remains valid once the motorbike is sold. Attached find the conditions for a motorbike with 150cc upwards with an insurance costing ~650฿ per year. Without the insurance, you will not become the tax label from the local transport department. Tbh, some Thais can barely afford it, wherefore not every motorbike is ensured. Who rents a bike should ensure the owner or rental station has this… Tbh2: we have an additional insurance (2+) for our used motorbikes, as I believe you probably need a hight coverage in case of having a ‘big’ accident. It covers personal injuries up to 50.000฿, means together with the compulsory insurance you have a coverage of 80.000฿,!which is a bit better. This insurance is about 5,000฿ per year. Worth or not? IMO yes!