BUCHANAN — Thousands of avid motocross fans braved the heat on Saturday to cheer on the world’s best motocross riders as legendary RedBud USA hosted the sixth round of the Lucas Oil Pro Motocross Championship, sanctioned by AMA Pro Racing.

As the season reached its halfway point, Red Bull KTM’s Ryan Dungey, of Belle Plaine, Minn., kept his dominant run going in the 450 Class, wining his fourth straight race with another 1-1 moto sweep. In the 250 Class, Monster Energy/Pro Circuit/Kawasaki’s Blake Baggett, of Grand Terrace, Calif., raced to his third victory of the season and second in-a-row with an impressive 1-1 effort.

In the opening 450 Class moto, it was Dungey who prevailed out of the gate, establishing himself as the rider to beat early while Team Yoshimura Suzuki’s James Stewart, of Haines City, Fla., followed in second in his return to action.

As Dungey pushed to open a gap on Stewart, the Suzuki rider went down, allowing Monster Energy Kawasaki’s Jake Weimer, of Rupert, Idaho, and Team Honda Muscle Milk’s Justin Brayton, of Ft. Dodge, Iowa, to move past.

On the following lap, Stewart encountered misfortune again, stalling his bike and falling to seventh. He eventually worked his way to a sixth-place result.

Out front, Dungey took the checkered flag by over 45 seconds ahead of the field

In Moto 2, MotoConcepts Suzuki’s Mike Alessi, of Victorville, Calif., grabbed the holeshot and led early, but it didn’t take long for Dungey to take over the top spot and pull away. Alessi, who was involved in a first-turn crash in the first moto, settled into second for the remainder of the moto, while Stewart bounced back to run third.

Dungey’s near 35-second win extended his moto winning streak to eight.

“Having James (Stewart) back this week was good to add another challenge, and it’s good for the sport,” said Dungey. “We made some more changes to the bike coming into (today) and I think we’ve made even more progress. My starts were good and I knew getting out front would make life easier, having a whole track to work with. It’s (too) early to think points, but you’ve got to be smart. With James back, you knew he’d be there, so I didn’t want to downplay him. I just wanted to get a good start and see how things played out.”

Brayton brought home his first overall podium result of the season in second (3-4), while Stewart finished third (3-6) despite his troubles.