Recalls:
http://www.allworldauto.com/recalls/harley_davidson_recalls_7-1.html
An apparently exhaustive list of Harley-Davidson recalls, service bulletins, and investigations.

E-mail Harley-Davidson with your complaints:
http://investor.harley-davidson.com/comment_new.cfm?bmLocale=en_US
HD's website "Contact Us" page is still conspicuously not accepting e-mail. Give them hell at this investor relations page instead.

File a formal complaint with the National Highway Traffic Safety Administration (NHTSA):
http://www-odi.nhtsa.dot.gov/ivoq/
if you believe your ride has a design flaw that makes it unsafe.