Its a stock 42t rear sprocket... He pretty much always uses stock gearing.
You can learn to do most all of those tricks pretty easy, just do it on a supermoto first, and no worries... The rolling burnouts and 180's are the easiest, the stoppies the hardest (for me anyways)
That is not a stock 42t rear sprocket....
![popcorn](http://ducatimonsterforum.org/Smileys/classic/popcorn.gif)
Pics or better yet video please...