The biggest AMA title showdown in recent years between Jeremy Martin and Marvin Musquin fizzled out in the opening moto of the season finale at Ironman raceway as Musquin had to retire with an ailing bike.

The pair entered the day with Martin just two points ahead of Frenchman Musquin, the pair surrounded in controversy about team orders when Martin's Yamaha team-mate Cooper Webb - and arch enemy of Musquin - moved over to let Martin through to take the victory.

But the dogfight finale never happened as the factory KTM failed in the fist moto, allowing Martin a relatively easy cruise to the title in both motos. Martin rode sensibly to take fourth and ninth place rides, ensuring the title was his.
Musquin said: "It's unfortunate that we had the mechanical issue in the first moto. It is something we would have never expected to happen but that is part of racing. This was still the best year of my career and I am really proud of myself and my team for our accomplishment. I am looking forward to moving up to the 450 for next year."

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With Martin riding for safe points and Musquin out, it left a whole slew of riders battling for victory. Webb won the first moto but crashed out of the second, allowing his Yamaha team-mate Aaron Plessinger take the overall win thanks to solid 2-1 finishes. Second was Kawasaki's Joey Savatgy - sealing third in the championship behind Martin and Musquin. Third on the day went to KTM's Jessy Nelson.

In the 450 class - where Ryan Dungey was already crowned champ a week ago - the KTM man took the overall once again with a 1-2 finish. He won the opener by 15 seconds but crashed and lost out in the final moto of the season to last year's champ, the troubled Ken Roczen. The finish was enough to elevate Roczen to second in the standings, ahead of Justin Barcia who ended the year third overall thanks to his relatively poor 7-3 finish in the finale.

Third overall on the day was Husky's Jason Anderson which meant he secured a fine sixth overall in the championship in his first season. Photo by Simon Cudby.

450 Class (Moto Finish)
1.Ryan Dungey, Belle Plaine, Minn., KTM (1-2)
2.Ken Roczen, Germany, Suzuki (3-1)
3.Jason Anderson, Edgewood, N.M., Husqvarna (2-6)
4.Justin Barcia, Monroe, N.Y., Yamaha (7-3)
5.Christophe Pourcel, Dade City, Fla., Husqvarna (4-7)
6.Trey Canard, Shawnee, Okla., Honda (8-5)
7.Blake Baggett, Grand Terrace, Calif., Suzuki (6-9)
8.Broc Tickle, Holly, Mich., Suzuki (15-4)
9.Josh Grant, Riverside, Calif., Kawasaki (10-8)
10.Phil Nicoletti, Cohocton, N.Y., Yamaha (11-10)

450 Class Championship Standings
1.Ryan Dungey, Belle Plaine, Minn., KTM, 547
2.Ken Roczen, Germany, Suzuki, 447
3.Justin Barcia, Monroe, N.Y., Yamaha, 441
4.Blake Baggett, Grand Terrace, Calif., Suzuki, 360
5.Christophe Pourcel, France, Husqvarna, 323
6.Jason Anderson, Edgewood, N.M., Husqvarna, 320
7.Broc Tickle, Holly, Mich., Suzuki, 311
8.Phil Nicoletti, Cohocton, N.Y., Yamaha, 250
9.Weston Peick, Wildomar, Calif., Yamaha, 223
10.Fredrik Noren, Sweden, Honda, 206

250 Class (Moto Finish)
1.Aaron Plessinger, Hamilton, Ohio, Yamaha (2-1)
2.Joey Savatgy, Thomasville, Ga., Kawasaki (5-2)
3.Jessy Nelson, Paso Robles, Calif., KTM (3-6)
4.RJ Hampshire, Hudson, Fla., Honda (8-4)
5.Matt Bisceglia, Tualatin, Ore., Honda (6-5)
6.Jeremy Martin, Millville, Minn., Yamaha (4-9)
7.Zach Osborne, Abingdon, Va., Husqvarna (10-7)
8.Christian Craig, Plymouth, Minn., Honda (9-8)
9.Cooper Webb, Newport, N.C., Yamaha (1-37)
10.Marvin Musquin, France, KTM (40-3)

250 Class Championship Standings
1.Jeremy Martin, Millville, Minn., Yamaha, 491
2.Marvin Musquin, France, KTM, 479
3.Joey Savatgy, Thomasville, Ga., Kawasaki, 348
4.Zach Osborne, Abingdon, Va., Husqvarna, 330
5.Jessy Nelson, Paso Robles, Calif., KTM, 323
6.Aaron Plessinger, Hamilton, Ohio, Yamaha, 311
7.Alex Martin, Millville, Minn., Yamaha, 288
8.Matt Bisceglia, Tualatin, Ore., Honda, 256
9.Shane McElrath, Canton, N.C., KTM, 248
10.RJ Hampshire, Hudson, Fla., Honda, 248