CTB, In most tourist areas of Indonesia you can hire small bikes cheaply, but generally Indonesia only import up to 150cc for the msaa market, above that tax is high and is in the hands of specialists shops, and rarely for hire. Having said that a 150cc in Idonesia is as much as you need, as the trafic would not allow speeding and roads are narrow.
In Bali and Yogyakarta to two main tourist areas you can find hire bikes on most main streets, you need an international license or you can get a temp. license at the local police station for a fee. rental is just a few US$ a day. Out side of those cities its still possible but you need to look harder.
I have no experience of the Phillipines.