Dirt bike / motor cross riding around Jakarta

Hi

Was wondering if anyone has some pointers or where the places are to ride dirt bikes (motor cross) in or around Jakarta.
I am looking to move there around the beginning of September and was wanting to bring my kit over and start riding.

If there are any tracks (motor cross) or trail riding (enduro style).
Any clubs that I should maybe sign up to and events that happen?

I am an intermediate rider and would really like to get back on a bile as I have been living in Auckland for 4 years and have not had the chance to ride.

I look forward to any advice or info that is out there.

Thanks