Jackal Racing is printed on a rider's helmet in Rockstar's Jason Duval 13 screenshot, as three dirt bikes tear through a mall.
Rockstar Games
The rider on Jason's left wears a purple and black helmet reading Jackal Racing in Rockstar's Jason Duval 13 screenshot, from the Launch Gallery. The name is printed in Rockstar's own screenshots; Rockstar hasn't described it in text.