That red bike with the striped seat is a Big-Head Fury with a flat-tracker frame kit.
Big Amal GP 1.5" carb, and a megaphone.
Also notice that there's no kicker. That's a run-and-bump start bike.
Race track stuff.
The white bike looks like a variation of a trials bike arrangement. It is very clean and nicely done. I like the color scheme of of the white with the brown seat. Tasty!