Marvin Musquin produced a 250cc masterclass at Huntington Beach State Park to win his fourth Red Bull Straight Rhythm title as American Carson Brown won in 125cc . After missing the last two years of Red Bull Straight Rhythm at Pomona — which ran in 2018 and 2019 — Musquin returned to California looking to continue his unbeaten streak . Musquin had already ridden to victory at the 2014 , 2016 and 2017 editions of the race and , this time around , the 32-year-old from La Réole in France switched things up and entered the event for the first time on a two-stroke . Despite the change to his usual weapon of choice , Musquin was the star attraction in the 250cc class , as he defeated top qualifier and reigning champion Ken Roczen of Germany on the back of great racing and photo finishes before the finale . Roczen overcame American home hope Justin Barcia - who went on to finish on the podium - with his upside-down whip over the big tabletop jump in the second run to secure his spot in the final . Musquin ’ s undefeated record is still intact , although he had a close call with a comeback win against Josh Hansen in the second run of the semi-finals to set up the Roczen showdown . “ For some reason , to be honest with you , I