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Infineon Raceway - Sonoma, CA April 30-May 2, 2004 Chevrolet Superbike Championship presented by Parts Unlimited |
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Best lap times - practice |
| Pos. | No. | Rider name | Bike | Best time | Best lap | Best mph | 2nd best time | 2nd best lap | 2nd best mph |
| 1. | 1 | Mathew Mladin | Suzuki GSX-R1000 | 1:38.029 | 20 | 81.530 | 1:38.047 | 18 | 81.512 |
| 2. | 98 | Jake P. Zemke | Honda CBR1000RR | 1:38.172 | 16 | 81.410 | 1:38.512 | 17 | 81.127 |
| 3. | 20 | Aaron W. Yates | Suzuki GSX-R1000 | 1:38.514 | 17 | 81.130 | 1:38.694 | 18 | 80.978 |
| 4. | 17 | Miguel DuHamel | Honda CBR1000RR | 1:38.599 | 21 | 81.060 | 1:39.410 | 18 | 80.394 |
| 5. | 155 | Ben D. Bostrom | Honda CBR1000RR | 1:39.851 | 20 | 80.040 | 1:40.011 | 25 | 79.911 |
| 6. | 41 | Joshua Kurt Hayes | Kawasaki ZX-10R | 1:39.915 | 14 | 79.990 | 1:40.376 | 11 | 79.620 |
| 7. | 32 | Eric Bostrom | Ducati 999R | 1:40.771 | 17 | 79.310 | 1:40.890 | 18 | 79.215 |
| 8. | 714 | Steve Crevier | Suzuki GSX-R1000 | 1:41.821 | 15 | 78.490 | 1:42.229 | 7 | 78.178 |
| 9. | 47 | Opie Caylor | Suzuki GSX-R1000 | 1:41.832 | 18 | 78.480 | 1:41.967 | 17 | 78.379 |
| 10. | 72 | Larry Pegram | Yamaha YZF-R1 | 1:41.954 | 9 | 78.390 | 1:42.187 | 8 | 78.210 |
| 11. | 96 | Eric C. Wood | Suzuki GSX-R1000 | 1:42.008 | 16 | 78.350 | 1:42.363 | 11 | 78.075 |
| 12. | 199 | Geoff May | Suzuki GSX-R1000 | 1:42.059 | 9 | 78.310 | 1:42.592 | 8 | 77.901 |
| 13. | 353 | David Stanton | Suzuki GSX-R1000 | 1:42.168 | 13 | 78.220 | 1:42.186 | 14 | 78.211 |
| 14. | 45 | Lee Acree | Suzuki GSX-R1000 | 1:42.258 | 16 | 78.160 | 1:42.879 | 9 | 77.683 |
| 15. | 44 | John Haner | Suzuki GSX-R1000 | 1:42.311 | 15 | 78.120 | 1:42.319 | 14 | 78.109 |
| 16. | 14 | Shawn M. Higbee | Suzuki GSX-R1000 | 1:42.524 | 7 | 77.950 | 1:42.887 | 11 | 77.678 |
| 17. | 168 | Ken Hill | Suzuki GSX-R1000 | 1:42.524 | 15 | 77.950 | 1:42.665 | 16 | 77.845 |
| 18. | 24 | Clint McBain | Suzuki GSX-R1000 | 1:42.598 | 16 | 77.900 | 1:42.879 | 8 | 77.683 |
| 19. | 179 | Jeff Williams | Suzuki GSX-R1000 | 1:43.138 | 11 | 77.490 | 1:43.248 | 12 | 77.406 |
| 20. | 29 | Robert M. Christman | Suzuki GSX-R1000 | 1:43.401 | 15 | 77.290 | 1:44.032 | 14 | 76.822 |
| 21. | 57 | Jeremy Toye | Yamaha YZF-R1 | 1:43.449 | 8 | 77.260 | 1:43.583 | 12 | 77.156 |
| 22. | 264 | Brien K. Whitlock | Suzuki GSX-R1000 | 1:43.519 | 5 | 77.200 | 1:43.813 | 13 | 76.984 |
| 23. | 147 | Mark C. Foster | Suzuki GSX-R1000 | 1:43.591 | 14 | 77.150 | 1:43.660 | 8 | 77.098 |
| 24. | 124 | Craig Connell | Suzuki GSX-R1000 | 1:43.629 | 10 | 77.120 | 1:43.808 | 7 | 76.988 |
| 25. | 42 | Rob Mesa | Suzuki GSX-R1000 | 1:43.727 | 14 | 77.050 | 1:44.175 | 8 | 76.717 |
| 26. | 26 | Andrew Nelson | Honda CBR1000RR | 1:43.772 | 18 | 77.010 | 1:44.046 | 9 | 76.812 |
| 27. | 210 | James B. Randolph | Yamaha YZF-R1 | 1:44.020 | 4 | 76.830 | 1:45.166 | 3 | 75.994 |
| 28. | 488 | Chris Siglin | Yamaha YZF-R1 | 1:44.090 | 5 | 76.780 | 1:44.092 | 6 | 76.778 |
| 29. | 19 | Jason Curtis | Suzuki GSX-R1000 | 1:44.248 | 12 | 76.660 | 1:44.772 | 13 | 76.280 |
| 30. | 283 | Garry Combs | Suzuki GSX-R1000 | 1:44.287 | 13 | 76.630 | 1:44.645 | 12 | 76.372 |
| 31. | 77 | Jack E. Pfeifer | Honda CBR1000RR | 1:44.309 | 19 | 76.620 | 1:44.502 | 18 | 76.477 |
| 32. | 78 | David Bell | Suzuki GSX-R1000 | 1:44.614 | 13 | 76.400 | 1:44.635 | 14 | 76.380 |
| 33. | 56 | Thomas G. Montano | Ducati 998S | 1:44.921 | 13 | 76.170 | 1:45.366 | 9 | 75.850 |
| 34. | 187 | Cory Denton West | Suzuki GSX-R1000 | 1:45.608 | 24 | 75.680 | 1:45.793 | 23 | 75.543 |
| 35. | 38 | Dean Mizdal | Suzuki GSX-R1000 | 1:45.674 | 5 | 75.630 | 1:46.005 | 8 | 75.393 |
| 36. | 940 | J. J. Roetlin | Suzuki GSX-R1000 | 1:45.913 | 6 | 75.460 | 1:45.953 | 19 | 75.430 |
| 37. | 88 | Kim Nakashima | Suzuki GSX-R1000 | 1:46.029 | 10 | 75.380 | 1:46.208 | 9 | 75.249 |
| 38. | 67 | John Scott Wilson | Suzuki GSX-R1000 | 1:46.373 | 5 | 75.130 | 1:47.352 | 8 | 74.447 |
| 39. | 161 | James J. King | Yamaha YZF-R1 | 1:46.670 | 5 | 74.920 | 1:48.075 | 6 | 73.949 |
| 40. | 64 | Jeremiah J. Johnson | Suzuki GSX-R1000 | 1:46.711 | 13 | 74.890 | 1:46.980 | 10 | 74.706 |
| 41. | 63 | Kevin Hanson | Suzuki GSX-R1000 | 1:47.251 | 19 | 74.520 | 1:47.346 | 16 | 74.451 |
| 42. | 198 | Kenyon Kluge | Suzuki GSX-R1000 | 1:49.369 | 9 | 73.070 | 1:49.377 | 8 | 73.068 |