Plessinger led the remainder of the race to earn his first moto win of the season at the track in which he broke through for his first career victory one year ago, crossing the line 12.7 seconds ahead of Webb. Forkner settled for third, but would end the afternoon on top.
With his 1-3 scores Forkner became the sixth different overall winner in the 250 Class this season and the 80th different winner in the history of the division. It's the third time this season a rider has broke through for the first overall win of his career and gives Ironman Raceway first-time event champions for back-to-back seasons.
"In the first moto I told myself not to look back because then I start thinking too much. I didn't [look back] until late and figured there's got to be someone behind me, but I was surprised to see I was up 23 seconds according to my mechanic. From there I just put it in cruise control and focused on hitting my lines," said Forkner, who finished the season with four consecutive podium efforts.
"In the second moto I got a good start but Aaron [Plessinger] got by me. I just tried to follow him and he messed up, so I got by. He got close to me so I knew I had to try and get some breathing room, and I ended up going down. I had to ride the rest of the moto basically with one eye because I got some sweat on the inside of my goggles. Cooper [Webb] ended up getting by me and I didn't really put up a fight. I just put it in cruise control because I was pretty sure I got it [the overall]."
Star Yamaha teammates were locked in a three-way tie for second, with Plessinger's moto win ultimately landing him in the runner-up spot (8-1) followed by Webb in third (5-2). Martin's fourth-place finish in the final moto left him off the podium in fourth (3-4).
Webb finished the season with a 73-point lead over Martin in the final standings, with Martin earning a career-best result. Despite finishing ninth overall (2-34), Savatgy clinched third in the final standings for the second straight season (-112), just seven points ahead of Forkner in fourth.
Of the Aussie's Luke Clout finished in 21st overall with a 17-35 finish in the 250 Class while Hayden Mellross finished 20th in the 450 Pro class with a 33-17 finish for the day.
The 2017 Lucas Oil Pro Motocross Championship will get underway next May. The 2017 schedule will be announced in the near future.
Main Photo: Roczen capped off a dominant, championship-winning season with his ninth moto sweep of 2016.
Photo: Simon Cudby
Lucas Oil Pro Motocross Championship - Ironman National - Indiana
450 Class Overall Results (Moto Finish)
Ken Roczen, Germany, Suzuki (1-1)
Justin Barcia, Monroe, N.Y., Yamaha (2-2)
Eli Tomac, Cortez, Colo., Kawasaki (3-3)
Marvin Musquin, France, KTM (4-4)
Jason Anderson, Rio Rancho, N.M., Husqvarna (5-5)
Phil Nicoletti, Cohocton, N.Y., Yamaha (6-8)
Weston Peick, Menifee, Calif., Yamaha (8-7)
Matt Bisceglia, Tualatin, Ore., Suzuki (11-6)
Fredrik Noren, Sweden, Honda (9-9)
Benny Bloss, Oak Grove, Mo., KTM (7-11)
450 Class Championship Standings
Ken Roczen, Germany, Suzuki - 584
Eli Tomac, Cortez, Colo., Kawasaki - 498
Marvin Musquin, France, KTM - 401
Justin Barcia, Monroe, N.Y., Yamaha - 360
Phil Nicoletti, Cohocton, N.Y., Yamaha - 229
Benny Bloss, Oak Grove, Mo., KTM - 228
Christophe Pourcel, France, Husqvarna - 217
Weston Peick, Menifee, Calif., Yamaha - 197
Andrew Short, Colorado Springs, Colo., KTM - 197
Fredrik Noren, Sweden, Honda - 192
250 Class Overall Results (Moto Finish)
Austin Forkner, Richards, Mo., Kawasaki (1-3)
Aaron Plessinger, Hamilton, Ohio, Yamaha (8-1)
Cooper Webb, Newport, N.C., Yamaha (5-2)
Alex Martin, Millville, Minn., Yamaha (3-4)
Adam Cianciarulo, Port Orange, Fla., Kawasaki (6-5)
Arnaud Tonus, Switzerland, Kawasaki (4-9)
Mitchell Harrison, Brighton, Mich., Yamaha (10-6)
Mitchell Oldenburg, Alvord, Texas, KTM (7-13)
Joey Savatgy, Thomasville, Ga., Kawasaki (2-34)
Justin Hill, Yoncalla, Ore., KTM (15-7)
250 Class Championship Standings
Cooper Webb, Newport, N.C., Yamaha - 495
Alex Martin, Millville, Minn., Yamaha - 422
Joey Savatgy, Thomasville, Ga., Kawasaki - 383
Austin Forkner, Richards, Mo., Kawasaki - 376
Aaron Plessinger, Hamilton, Ohio, Yamaha - 351
Jeremy Martin, Millville, Minn., Yamaha - 321
Zach Osborne, Abingdon, Va., Husqvarna - 312
Adam Cianciarulo, Port Orange, Fla., Kawasaki - 266
Arnaud Tonus, Switzerland, Kawasaki - 243
Mitchell Oldenburg, Alvord, Texas, KTM - 237