Four of the remaining factory AMA Superbike teams are testing at Willow Springs this week, in preparation for the upcoming AMA National at the Rosamond, California racetrack.

Yoshimura Suzuki started testing Wednesday, along with the Yamaha Superbike team and Graves Yamaha.

On Thursday, Honda joined Yoshimura Suzuki and Yamaha, and, on Friday, Kawasaki will test.

The teams are at Willow Springs now to avoid the AMA restrictions on pre-event testing for riders who are in the top 10 in Superbike and 600cc Supersport points.

The Willow Springs National is scheduled for September 14-16, following a Team Hammer School and Track Ride day on Wednesday, September 12 and a Team Hammer Pro Practice on Thursday, September 13.

Reached by phone on Thursday, August 30, Team Kawasaki’s Al Ludington–Crew Chief for Eric Bostrom–confirmed that Kawasaki planned to test on Friday.

Ludington also commented on the recently announced news that Kawasaki and Suzuki had formed a strategic alliance, saying, “We’ve requested Mat’s set-up notes, but we haven’t heard back from Suzuki yet.”