I have a 1975 R90/6 that I have been refurbishing, cleaning up, etc. I really like reading about all of the projects that everyone is doing with different airheads. I was wondering if anyone knows of threads or other websites that have an outline of all the various airhead models along with the pros and cons of each model. It would be cool to have a resource where a person could refer to if they see a bike for sale and wondered about it's various quirks, downsides, advantages, desirablity, etc. Say, for instance, I see a 1993 R100R for sale and want to know more about it. Is it highly desirable, and known problems, etc. Thanks!