Monster Energy Yamaha Star Racing enjoyed a stellar debut with the allnew YZ450F at the opening round of the 2023 Monster Energy AMA Supercross season Leading the charge was Monster Energy Yamaha Star Racing ’ s Eli Tomac , who added Anaheim 1 winner to his long list of career achievements , taking a thrilling victory at the Monster Energy AMA Supercross season opener . It was a stellar first outing for the 2023 YZ450F at the Angels Stadium of Anaheim , with teammate Dylan Ferrandis also showing strength and narrowly missing the podium in a drama-filled 450SX Main Event . Riders were met with challenging conditions after Mother Nature drenched Southern California in the lead-up to the opening round of the 2023 Monster Energy AMA Supercross Championship and the inaugural SuperMotocross World Championship series . Tomac got off to a great start , taking the runner-up spot in qualifying and grabbing the holeshot in the first 450SX heat race