Sutherlin 10 Burson 657 Mammoth? edit. I'm the guy behind 657 in the white t shirt with his stomach sticking out.....I think I don't think Ty Davis' bike was running at the end and they ran out of parts according to him or scavenged parts off his bike for the others.
Ty's bike looks like one of the preproduction 2009 bikes from the press introduction down in the Caribbean. Forks are Zokes and the graphics are off of the 2009 as well. The other photos look like 450s.