Ricky Carmichael has clinched his final AMA Supercross/Motocross championship, by wrapping up the 2006 Motocross crown with victory at Binghamton on Sunday.

Carmichael took the title with two races remaining and pushed his career total to a record 10 consecutive titles dating back to his rookie year in 1997.

The Suzuki star's already comfortable task was made easier when series runner-up Chad Reed announced that he would sit out the remainder of the season with a shoulder injury, meaning RC started the event needing only to finish 17th in the first moto to clinch the crown.

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But in typical Carmichael fashion, the Floridian went out and won the first moto, then followed that up with a come-from-behind victory over Kawasaki's James Stewart in the second moto, to take his eighth overall win of the season and a record 143rd of his career.

"I feel really fortunate; it's been a great career," said Carmichael, who announced earlier this season that 2006 was going to be his last full season of AMA Supercross/Motocross. "The way I look at it; if I keep racing I'm going to get beat. You have to know when your time is and I'm happy with what I've accomplished in my career. I have some other opportunities and look forward to seeing what they have in store for me. I'm glad I could go out on top."

Stewart finished second on the day with a 2-2 moto finishes, while Honda's Kevin Windham was third with 3-3 results.

In the Motocross Lites class, Suzuki's Broc Hepler won the first moto and then followed that up with a strong third in the second outing to take his second overall win of the season.

Kawasaki's Ryan Villopoto finished second on the day with a 4-1 moto finish and took charge of the championship standings after KTM's Mike Alessi finished 12th overall (38-4). Yamaha rookie Josh Hill was third with 2-5 results.

The Toyota AMA Motocross Championship, presented by FMF, takes a one-week layoff before heading to Delmont on September 3 for the Monster Energy/Kawasaki Steel City National.