Image: Simon Cudby.

In his 100th-career start, Red Bull KTM’s Ryan Dungey won his eighth Monster Energy AMA Supercross, an FIM World Championship, race of the season in front of 35,241 fans at Sam Boyd Stadium for the 2015 season finale.

Red Bull KTM’s Marvin Musquin led wire-to-wire en route to his first-ever Dave Coombs Sr. East/West Shootout victory, marking the sixth time this season that KTM has swept both main events.

Dungey led BTO Sports KTM’s Justin Brayton and GEICO Honda’s Eli Tomac across the SupercrossLive.com Holeshot line to kick off the 450SX Class main event. On the opening lap, Autotrader.com/Toyota/Yamaha’s Weston Peick moved into third place.

Out front, Dungey and Tomac traded positions on lap one, but on lap four Tomac crashed while in pursuit, still able to remount in second place.

Peick and Discount Tire Racing/TwoTwo Motorsports’ Chad Reed engaged in a heated battle for third place on lap eight, but Peick would hold his position and ride to his second podium finish of a year with a third place. Tomac finished second, his 11th podium of the season.

“We really pushed the pace out there tonight and went back forth during the early part of the race” said Dungey. “This was a great year; I set a [personal] record for most wins in a season with eight and couldn’t be happier.”

Reed was running inside the top five when he experienced trouble, which looked to be a deflating tyre that dropped him down the order to seventh at race’s end.

Musquin, who won the Eastern Regional 250SX Class Championship last week, started the East/West Shootout with the SupercrossLive.com Holeshot Award. GEICO Honda riders RJ Hampshire and Malcolm Stewart followed in second and third, respectively.

Stewart passed Hampshire on the opening lap for second place. Hampshire held down the number three position until Lap 11, when his teammate Matt Bisceglia passed him and secured the final position on the podium.

Stewart earned his best Las Vegas finish in second, besting his fifth-place finishes in 2011 and 2014. Musquin went on to dominate for his first victory in Sam Boyd Stadium in his final 250SX Class race.

“It’s like a dream come true tonight,” said Musquin. “I have never won in Las Vegas before and I used to watch this race back in the day when I was a kid, but tonight it’s my turn. To win my very last supercross race on a 250 is awesome.”

Yamalube/Star Racing/Yamaha’s Cooper Webb, who won the Western Regional 250SX Class Championship, missed the main event after sustaining an injury during practice. Coming into tonight’s race the Eastern and Western Regions were tied in Dave Coombs Sr. East/West Shootout victories, and Musquin’s win gave the Eastern Region the edge with the region’s 10th win.

HRT Racing’s Vicki Golden made history by becoming the first female in more than four decades of Monster Energy Supercross to qualify for the ‘fast 40’ – the riders that transition to the night program from timed qualifying – for the 2015 finale.

The evening ended early for Australian privateer duo Jackson Richardson (XPR Motorsports Honda) and Taylor Potter (Honda), finishing fifth and 10th respectively in the LCQ.

2015 Monster Energy AMA Supercross
Round 17 – Las Vegas, NV

450SX Class results:
1. Ryan Dungey
2. Eli Tomac
3. Weston Peick
4. Cole Seely
5. Josh Grant
6. Blake Baggett
7. Chad Reed (AUS)
8. Justin Barcia
9. Justin Brayton
10. Broc Tickle

450SX Class championship standings:
1. Ryan Dungey 390
2. Eli Tomac 305
3. Cole Seely 277
4. Chad Reed (AUS) 226
5. Blake Baggett 223
6. Trey Canard 204
7. Jason Anderson 200
8. Broc Tickle 194
9. Andrew Short 180
10. Weston Peick 160

Dave Coombs Sr. East/West Shootout results:
1. Marvin Musquin
2. Malcolm Stewart
3. Matt Bisceglia
4. Aaron Plessinger
5. Alex Martin
6. Zach Osborne
7. RJ Hampshire
8. Cole Martinez
9. Shane McElrath
10. Kyle Peters

Click here for detailed results