Airheads.org Club dedicated to the two valve Boxers and a simple credo.
Boxerworks.com Great support sites on the web for Airhead BMWs. Nathan Mende has been riding and working on BMWS for decades.
Benchmarkworks.com Vech and Elaine have EVERTHING you need for your vintage BMW from pre-war to the '70s.
BMWRA.org Offical site for the BMW Riders Association International. A forum for the SERIOUS BMW rider.
BMWMOA.org Largest BMW "club" in the country.
IBMWR.org Internet BMW Riders list. Great flea market, tech information, and more. Largest virtual BMW club on this planet.
5united.org /5 Virtual Club
Snowbum's Free Tech Support Site Fantastic site for a wealth of BMW information... and more.