I'm new to the motorcycle world.  I'm doing a project for a small marketing research firm.  We are trying to figure out the state of the custom bike market.  From what I have found in articles and postings online it looks like the market peaked a few years ago (2004-2005) and it is declining now.  Does anyone have any good resources or links that can help support this initial finding?  Or do you have other thoughts?  

Thanks for your insight!