"Yamaha" - it's Japanese for "fuck your sports car."
Looks like Moab, maybe. I've ridden on the "slick rock" and area. Great fun and lots of scarry stuff.
I guess you'd have to pretty much keep the throttle pinned, not a lot of room for hesitation.
The HD video of this and a few others from this shoot are available on Advrider somewhere. Reposte from like 4 years ago. Nice riding.
Yeah, that's ADV inmate Dodgerdodger. Pretty famous clip now.
Definite 3rd ball, no doubt.
'third ball' my foot ... freakin 'HAIR-BALL' is what that is !!!