Dazon project and I need help!

[Ikarskarn]

Check out this one:

http://centralmich.craigslist.org/sno/4063757249.html

I don't want to buy one like that, I want to do it myself. ;-)

 

[OzFab]

This should tell you a little about chain sizes; for a lot more info, you could browse this site.

As for tooth counts, there's a lot of factors involved there like engine type/size, tyre size, desired speed, etc