They will be on CBSSN starting at 1:00 AM EST Sunday March 1st. The MX1 is at 1 AM and the MX2 at 2 AM. Qatar is the first race and I'm looking forward to seeing how RV stacks up against the Euros! I only saw some of the MXGPs last year but I'll watch all of this this year.
http://www.cbssportsnetwork.com/schedule/cbssn
http://www.cbssportsnetwork.com/schedule/cbssn