In reply to Chet:
Well, am I glad you decided to participate in this discussion. I'm a big fan of the Riot.
So I have to ask, What kind of rear sprocket (overall ratio) do the guys with R1's run in the Riot?
Honestly, while my objective was a 600 kg target weight, since this is my first fully custom built, I am being realistic. I already know of a few places I can remove weight, so maybe for future development.