Jeff,
I have limited experience of marketing track cycling images, but I'll throw in a quick idea or two...
Have you approached all the teams involved? Custom online galleries highlighting riders from each team may generate additional sales. Most teams will have websites with contact details, maybe trade a thumbnail pic for their site in return for a link to your gallery.
Are you marketing unique products? Rather than straight prints, why not offer poster style prints, calendars, DVD slide-shows or collages for each team.
Are any of the teams local to you? Perhaps you could pay a visit to one of their team events/meetings and drop off some samples, flyers, do some on-site printing?
For the teams that are not local, then try some direct marketing - post out a pack of contact prints, order form and return mailer - follow up with a phone call, e-mail etc...
Can you set up an arrangement with the event organisers to drive sales, maybe linking via their website? Assuming of course they didn't have their own official photogs there...
How are you operating your online sales? Is it easy to buy from you? Are orders fulfilled quickly? If it's not easy to buy then this may limit your opportunities.
OK... it's all pretty obvious stuff and you're probably doing some/all of it already *lol*... but some thoughts nonetheless... good luck!
---- Gavin