I once got stopped with my DL650 in Bali, the police was checking every scooter, and once they realised I had foreign plates, they went through all my papers (glad I had the carnet with me at that time!) ... after about 20 minutes they let me go, no mention of insurance, which the bike did not have. This was in 2008.
Just remember, that when you do like this, you risk paying all damage to everybody else out of your own wallet, if you are involved in an accident. (But even if you HAD some sort of ´insurance´ for this country, there´s no guarantee that it would help you out much!)
That´s really something to think about before you decide to do a trip like this.
In case you´re bringing the bike in via Jakarta, don´t mean to scare you, but I met a German biker, who had had his bike stuck there for weeks. WITH CARNET!! He was in Bali trying to cool his nerves a bit at that time, don´t know how that story ended. So hoping it´ll be easier for you!