In Reply to: Riding motorbikes ???? posted by Debs_thirdtime on Monday, 10. May 2010 at 08:40 Bali Time:
A car license does not allow you to ride a motor cycle of any CC capacity in Indonesia, be it under or over 50CC. Indonesia doesn't give a toss about what you are, and are not, allowed to ride with a car license in another country. In THEIR country you have to have a bike license. End of story.
You must have a motor bike license. You also need to get an International Driving Permit which shows you have a motor bike license, and carry both your Australian license and the IDP.
As others have said, under 50CC bikes are not readily available in Bali anyway (there are some) but you still need a bike license.