James Stewart became the fourth different 450 winner of 2012 with his Oakland W. Image: Simon Cudby.

In front of 46,017 fans at O.co Coliseum, Toyota/Yamaha/JGRMX’s James Stewart won his first Supercross Class main event of the 2012 Monster Energy AMA Supercross, an FIM World Championship, season.

TwoTwo Motorsports Honda’s Chad Reed opened the Supercross Class main event by winning the holeshot, with Supercross.com Honda’s Andrew Short and Monster Energy/Pro Circuit/Kawasaki’s Josh Hansen following in second and third, respectively.

Stewart, who won in Oakland last year, made quick work of Hansen, making the pass to secure third place on the end of the opening lap. Points leader Ryan Dungey finished lap one in ninth place.

On lap two, Stewart moved around Short and set his sights on Reed. After stalking Reed relentlessly for several laps, Stewart passed him on lap nine and checked out. Stewart became the fourth different Supercross Class winner of the season.

Reed finished second and Monster Energy Kawasaki’s Villopoto finished third. Reed and Dungey are now tied for first place at 85 points apiece.

“I would like to dedicate this win to my mechanic, Mark ‘Tex’ Adams, who passed away this week,” said Stewart. “I got in a rhythm out there tonight and put together a great race.

“I had a tough couple of races this year, and tonight I got it done.”

Meanwhile, Yoshimura Suzuki’s Brett Metcalfe was 14th, and Cody Mackie made his first AMA main event with a 16th place finish on debut for Jeff Ward Racing.

GEICO Honda’s Eli Tomac won his second consecutive Western Regional Supercross Lites Class race.

Rockstar Energy Racing Suzuki’s Martin Davalos grabbed the holeshot with Monster Energy/Pro Circuit/Kawasaki’s Dean Wilson on his rear wheel as they headed out of turn one.

Tucked in behind the leaders, Tomac held down the number-three spot. While chasing down Davalos on lap one, Wilson shot off the track, crashing and losing valuable positions as Tomac moved into second place.

On lap two, Davalos bobbled, which allowed Tomac to make a pass for the lead. Zach Osborne, of Chesterfield, S.C., pushed his Monster Energy Yamaha into second place on lap six, but was passed by Rockstar Energy Racing’s Jason Anderson on lap 10.

Anderson crashed one lap later, going the number-two spot to Osborne. On lap 12, Osborne engaged on a hotly contested battle with Red Bull KTM’s Marvin Musquin.

Musquin made a solid pass and held on for second place with Osborne in third for the second consecutive weekend.

Tomac extended his points lead to 15 before heading back to Angel Stadium next weekend.

“This is my best season ever,” said Tomac. “Our team worked really hard to give me a great bike, and I made the most of it. I now have a nice lead going into Anaheim.”

Top Australian was Matt Moss for JDR/J-Star/KTM in fifth, while teammate Ryan Marmont was 19th.

Racing resumes next Saturday at Angel Stadium in Anaheim, California.

2012 Monster Energy AMA Supercross, an FIM World Championship
Round Four – Oakland, CA

Supercross Class Results:
1. James Stewart, Haines City, Fla., Yamaha
2. Chad Reed, Dade City, Fla., Honda
3. Ryan Villopoto, Poulsbo, Wash., Kawasaki
4. Ryan Dungey, Belle Plaine, Minn., KTM
5. Andrew Short, Smithville, Texas, Honda
6. Kevin Windham, Centreville, Miss., Honda
7. Davi Millsaps, Murrieta, Calif., Yamaha
8. Jake Weimer, Rupert, Idaho, Kawasaki
9. Justin Brayton, Murrieta, Calif., Honda
10. Josh Hansen, Elbert, Colo., Kawasaki

Supercross Class Season Standings:
1. Chad Reed, Dade City, Fla., Honda – 85
2. Ryan Dungey, Belle Plaine, Minn., KTM – 85
3. Ryan Villopoto, Poulsbo, Wash., Kawasaki – 83
4. James Stewart, Haines City, Fla., Yamaha – 73
5. Jake Weimer, Rupert, Idaho, Kawasaki – 61
6. Kevin Windham, Centreville, Miss., Honda – 58
7. Andrew Short, Smithville, Texas, Honda – 52
8. Josh Hansen, Elbert, Colo., Kawasaki – 47
9. Brett Metcalfe, Lake Elsinore, Calif., Suzuki – 45
10. Davi Millsaps, Murrieta, Calif., Yamaha – 42

Western Regional Supercross Lites Class Results:
1. Eli Tomac, Cortez, Colo., Honda
2. Marvin Musquin, Murrieta, Calif., KTM
3. Zach Osborne, Chesterfield, S.C., Yamaha
4. Ryan Sipes, Ekron, Ky., Yamaha
5. Matt Moss, Sussex Inlet, NS
6. Travis Baker, Temecula, Calif., Honda
7. Nico Izzi, Menifee, Calif., Yamaha
8. Max Anstie, Hemet, Calif., Honda
9. Martin Davalos, Cairo, Ga., Suzuki
10. Dean Wilson, Menifee, Calif., Kawasaki

Western Regional Supercross Lites Class Season Standings:
1. Eli Tomac, Cortez, Colo., Honda – 88
2. Dean Wilson, Menifee, Calif., Kawasaki – 73
3. Zach Osborne, Chesterfield, S.C., Yamaha – 67
4. Marvin Musquin, Murrieta, Calif., KTM – 64
5. Tyla Rattray, Wildomar, Calif., Kawasaki – 60
6. Cole Seely, Murrieta, Calif., Honda – 57
7. Jason Anderson, Edgewood, N.M., Suzuki – 53
8. Nico Izzi, Menifee, Calif., Yamaha – 46
9. Max Anstie, Hemet, Calif., Honda – 45
10. Ryan Sipes, Ekron, Ky., Yamaha – 43