Mat Mladin and Jason DiSalvo undercut existing lap records for the AMA Superbike and Formula Xtreme classes, respectively, during AMA team testing Tuesday at Barber Motorsports Park, in Birmingham, Alabama. Riding his Dunlop-equipped Yoshimura Suzuki GSX-R1000, Mladin recorded a 1:24.79, well under his Superbike lap record from 2005, 1:25.047. Jason DiSalvo, riding his Dunlop-fitted Yamaha YZF-R6, turned a 1:27.5 lap time around the 2.3-mile, 16-turn road course, faster than Miguel Duhamel’s one-year-old lap record of 1:27.746. DiSalvo was also the fastest rider in the Superstock division, turning a 1:26.53 on his Dunlop-backed Graves Yamaha YZF-R1 LE, while Roger Hayden topped all Supersport testers with a 1:28.3 on his factory Kawasaki ZX-6RR. Rain kept the riders off the track until approximately noon local time. The only rider known to have crashed during the test was Jake Zemke, who fell off his American Honda CBR1000RR Superbike in turn nine. Zemke was seen riding the bike back to the pits. The next multi-team AMA test is scheduled for early-April at the new Miller Motorsports Park, in Tooele, Utah. Unofficial Test Lap Times: Superbike (current lap record 1:25.047, Mat Mladin, 2005): 1. Mat Mladin (Suz GSX-R1000), 1:24.79 2. Ben Spies (Suz GSX-R1000), 1:25.3 3. Jake Zemke (Hon CBR1000RR), 1:25.65 4. Neil Hodgson (Duc 999F06), 1:25.7/Tommy Hayden (Kaw ZX-10R), 1:25.7 6. Roger Hayden (Kaw ZX-10R), 1:26.0 7. Aaron Yates (Suz GSX-R1000), 1:26.2 8. Miguel Duhamel (Hon CBR1000RR), 1:26.27 9. Ben Bostrom (Duc 999F06), 1:26.5 10. Larry Pegram (Hon CBR1000RR), 1:27.2 11. John Haner (Suz GSX-R1000), 1:27.6 12. Jason Pridmore (Suz GSX-R1000), 1:28.4 Superstock (current lap record, 1:25.832, Jamie Hacking, 2005): 1. Jason DiSalvo (Yam YZF-R1 LE), 1:26.53 2. Jamie Hacking (Yam YZF-R1 LE), 1:26.8 3. Aaron Yates (Suz GSX-R1000), 1:26.9 4. Aaron Gobert (Hon CBR1000RR), 1:27.2 5. Geoff May (Suz GSX-R1000), 1:27.23 6. Damon Buckmaster (Kaw ZX-10R), 1:27.6 7. Steve Rapp (Suz GSX-R1000), 1:27.7 8. Jason Pridmore (Suz GSX-R1000), 1:27.8 9. TIE, Jake Holden (Suz GSX-R1000)/Eric Bostrom (Yam YZF-R1 LE), 1:27.9 11. Josh Hayes (Hon CBR1000RR), 1:27.92 12. Marty Craggill (Suz GSX-R1000), 1:28.00 13. Chris Ulrich (Suz GSX-R1000), 1:28.31 14. Matt Lynn (Suz GSX-R1000), 1:28.6 15. Robertino Pietri (Suz GSX-R1000), 1:30.09 Formula Xtreme (current lap record, 1:27.746, Miguel Duhamel, 2005): 1. Jason DiSalvo (Yam YZF-R6), 1:27.5 2. Aaron Gobert (Hon CBR600RR), 1:28.0 3. Josh Hayes (Hon CBR600RR), 1:28.49 4. Kurtis Roberts (Suz GSX-R600), 1:28.5 5. Eric Bostrom (Yam YZF-R6), 1:28.8 Supersport (current lap record, 1:27.635, Tommy Hayden, 2004): 1. Roger Hayden (Kaw ZX-6RR), 1:28.3 2. Jamie Hacking (Yam YZF-R6), 1:28.41 3. Ben Spies (Suz GSX-R600), 1:28.5 4. Geoff May (Suz GSX-R600), 1:29.0 5. Damon Buckmaster (Kaw ZX-6RR), 1:29.9 6. Ryan Elleby (Hon CBR600RR), 1:30.4 7. Shea Fouchek (Suz GSX-R600), 1:33.04 Ben Attard (Kaw ZX-6RR), N.A.