This was Chris Blais' bike from the KTM/Redbull team, the KTM 690 Baja:

http://borynack.com/KTM690/images/KTM690.jpg
http://borynack.com/KTM690/images/KTM6901.jpg
http://borynack.com/KTM690/images/KTM6902.jpg
http://borynack.com/KTM690/images/KTM6903.jpg

here it is in pre-runner trim:

http://borynack.com/KTM690/images/KTM6904.jpg
http://borynack.com/KTM690/images/KTM6905.jpg
http://borynack.com/KTM690/images/KTM6906.jpg
http://borynack.com/KTM690/images/KTM6907.jpg

for any offroad enthusiasts the name Chris Blais might be familiar because he has been running the Dakar on the KTM team for four (IIRC) years now. Used to be part of Team Honda in their Baja efforts. They came in second to 1x (Hengeveld - Team Honda).

he must have a butt of iron.

If I'm not mistaken they spend a good portion of the time they're riding standing up during the Dakar.

If I'm not mistaken they spend a good portion of the time they're riding standing up during the Dakar.
In offroad races its ~ 70% standing up, with 20% in a crouch with your ass just barely touching the seat and 10% sitting down. Sitting down while racing at 70+ mph in silt on a dirtbike is suicide. I think there was one team member with Blais and they swapped off at different times.