Now thats awesome , what a great little Pan Head Donk "sound's the good's too" .
that is unreal, what a great sound...even has the smoke to match...
I've posted about this guy previously. He's very skilled, see this link for a detailed photo of that motor and a link to his website:
http://www.hdforums.com.au/Default.aspx?tabid=71&forumid=15&tpage=1&view=topic&postid=62614#62614