Several top MotoAmerica teams and official control tire supplier Dunlop are testing this week on the 3.0-mile road course at Thunderhill Raceway Park, in Willows, California, north of Sacramento.

Participating in the test are M4 ECSTAR Suzuki’s Valentin Debise, Monster Energy/Yamalube Yamaha’s Cameron Beaubier and Garret Gerloff, and Yoshimura Suzuki’s Toni Elias and Roger Hayden.

Monster Energy/Yamalube Yamaha also has four-time AMA Pro Superbike Champion turned test rider and rider coach Josh Hayes present.

Beaubier was the first rider to take to the track at 10:49 a.m., when the ambient temperature was 46 degrees F.

The test is scheduled to last until Friday, December 8, a day that will be dedicated to Dunlop tire testing. Additional teams and riders are expected to join the test on Friday.

The test is not open to the public.