Excellent suspension, handling and frame design site.

[jaydee]

I have a book by Tony Foale, Motorcycle handling and chassis design. It is a bible I keep close by when building a project and has helped me immensely when trying to figure out the linkages and suspension design when using swingarms that weren't designed for the frame I might be using i.e. slingshot frames and single siders. Thought I'd have a look online and see if I could find anything new by the author and ended up stumbling across his own site! Lots of great info including all manor of steering and geometry calculators (found in freeware section), articles and galleries.
Definitely worth a look if you are trying to set up a one-off special or building a streetfighter with different front and rear ends. 

www.tonyfoale.com/

[imago]

Good find! That's a site to loose a few hours on.