Vesrah Suzuki’s Mark Junge broke his own lap record at Putnam Park Road Course in Mt. Meridian, Indiana Sunday, during WERA National Challenge Series spring action. Junge’s existing lap record was 1:11.001, but in winning the Open Superstock race Junge broke the record on nearly every lap and finally set the new mark at 1:10.478 on his GSX-R1000 with Metzeler DOT-labeled tires. Arclight Suzuki’s Scott Harwell finished second Team Xtreme/Pennzoil’s Wade Buffington was third.

Vesrah Suzuki’s Glenn Szarek beat Harwell to win the Heavyweight Twins race on a TL1000R, and Szarek ran away in the 750cc Superstock final with best lap at 1:10.6 on a GSX-R750. Like Junge, Szarek uses Metzeler tires.

Chris “Opie” Caylor beat Junge in 600cc Superstock and Paramount Racing’s Joe Temperato was third, all three on GSX-R600 Suzukis on Metzeler tires.

Team Outa Sight’s Jason Peters won both the 125cc Grand Prix and the two-strokes-only Formula Two races by large margins on his Dunlop slick-equipped Honda RS125.

The day ended with Twowheelsales.com’s Tim Bemisderfer winning the Formula One race on his Dunlop DOT-shod GSX-R1000. Bemisderfer was the last man standing in a race filled with crashes and off-track excursions.