After wins in Denver and Oklahoma, Manxman David Knight could win a bonus of 50,000 US dollars if he wins the final round of the 2007 American Endurocross Series.
The prize is only paid if a rider completes a triple crown of victories.
He has already enjoyed a superb season in the United States of America by clinching the Grand National Cross-Country title at his first attempt.
Peter Hickman feeling confident ahead of TT 2026 campaign
Fourteen-time winner missed out on racing last year after crash
Club receives funding for Island's first SuperEnduro track
Prevail Motorcycle Club hopes it will inspire the next generation
Charity to assist with Pre-TT Classic preparations
Beach Buddies set to clean entire Billown Course
McGuinness: TT is 'the journey that keeps on giving'
Twenty-three-time winner celebrating 30 years at the event in 2026