Aircooledrdclub.co.uk is the official yamaha's air cooled 2 stroke twins.
Yamaha Aircooled RD Home Page
Excerpted from the website description:
- The Official Aircooled RD Club web site. Paying homage to Yamaha's aircooled 2 stroke twins. Find information about Yamaha motorcycles with aircooled RD twin engines. Explore technical tips and data, a photo gallery, and bike links.