650 Central - Dedicated to the maximum enjoyment of the landmark Japanese twin, the Yamaha XS650.

XS-650 Garage - The largest XS-650 related message board on the internet.  Over 2000 topics, 76,000 posts and 4000 members.

650wiki.org - A guide written collaboratively by many of its readers and dedicated to all technical aspects of the Yamaha XS650 Twin.

Mikes XS - XS 650 New OEM & Vintage Parts Supply Warehouse

650 Rider - Another great message board / community website with over 4000 registered members

Biker.net - Yamaha XS650 References and Info (including XS650 Service Manual 1978-1981 found here )

Yamaha 650 Society - The Yamaha 650 Society is dedicated to enhancing the motorcycling experience of our 600 member (and growing) organization.

Yamaha XS650 Finland - A website of 65 registered Finnish XS650ers

Yamaha XS650 Ignition System - Low cost, reliable electronic ignition system to replace the points on the Yamaha XS650, and the factory TCI electronic system.

Yamaha XS-650 Club of Australia - A website of 65 registered Australian XS650ers

XS 650 Cafe Racer - Great article by Glen Roberts on a Cafe Racer built by Hal Reid