Copyright 2004, Roadracing World Publishing, Inc.

The start of AMA Superstock practice at California Speedway was delayed approximately 30 minutes due to moisture on the racetrack.

Sunday Morning Provisional AMA Superstock Practice Times:

1. Jamie Hacking, Yamaha YZF-R1, 1:26.757
2. Aaron Gobert, Yamaha YZF-R1, 1:26.865
3. Damon Buckmaster, Yamaha YZF-R1, 1:26.897
4. Ben Spies, Suzuki GSX-R1000, 1:26.907
5. Roger Lee Hayden, Kawasaki ZX-10R, 1:27.575
6. Jason DiSalvo, Yamaha YZF-R1, 1:27.706
7. Tommy Hayden, Kawasaki ZX-10R, 1:28.043
8. Josh Hayes, Kawasaki ZX-10R, 1:28.577
9. Alex Gobert, Honda CBR1000RR, 1:28.659
10. Jake Holden, Suzuki GSX-R1000, 1:28.742
11. John Haner, Suzuki GSX-R1000, 1:28.810
12. Steve Rapp, Suzuki GSX-R750, 1:28.834
13. Chris Caylor, Suzuki GSX-R1000, 1:28.834
14. Shawn Higbee, Suzuki GSX-R1000, 1:29.104
15. Vincent Haskovec, Suzuki GSX-R750, 1:29.156
16. Eric Wood, Suzuki GSX-R1000, 1:29.692
17. Corey Eaton, Suzuki GSX-R1000, 1:30.349
18. Jason Curtis, Suzuki GSX-R1000, 1:31.284
19. Anthony Gobert, Honda CBR1000RR, 1:31.502
20. David Sanders, Suzuki GSX-R1000, 1:31.745