Well, it's the one he was driving at the X games (shown here outside Jlaw's Monster'd motor home), according to Trip at VitalMX:
X Games does give the bigger names flashy cars for the week they are here. I heard the car was his agents, maybe X Games rented it for him? It had a little Monster sticker in the back window.
Okay... I'll just admit to being a little jealous, sure, but is this just another example of ESPN playing the nation's top motorcycle talent? And the racers don't care because it feels so good to be treated like the moneymakers that they are!