I have a Thai motor bike drivers license which through an international agreement was told also acceptable in Indonesia. Very important to drive in Asia(or anywhere) with valid license for that country. Besides avoiding occasionally getting into hassle with police, if you get in accident, health insurance companies can decline to cover you as you are operating vehicle illegally. Example; drunk, stoned or no license.
Also, with motorcycle ALWAYS wear helmet! Stories of people getting into horrific accidents, running up huge medical bills and not being able to get evacuated to best medical care because lost med coverage even though fully insured. They were not wearing helmet. Driving motorbike is illegal in many countries (eg: Thailand, Indonesia) without protective head gear and therefore health care insurance companies not obligated to cover.