Dominique Aegerter led Friday Moto2 practice at Indianapolis, continuing a strong run of form while posting a new fastest lap of 1m 37.518s on the revised track.

Earlier rain cleared completely for the intermediate class, with Swiss rider Aegerter posting his best with just nine seconds left on the clock.

The Technomag carXpert rider comes to the Brickyard having won the last Moto2 race in Germany, the first Suter victory of 2014, then finishing third in the Suzuka 8 hours.

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Dynavolt Intact GP rider Sandro Cortese briefly held the top time, but missed out by 0.010 in second, colliding with Azlan Shah on track looking for space that was not there as he lost position on paper.

Championship leader and last year's race winner; Tito Rabat improved one position as he took the flag to complete the top three for Marc VDS.

Tom Luthi finished Friday in fourth for the Interwetten Paddock team just ahead of top Speed Up rider Ant West who moved up to fifth with a late fast lap for QMMF.

Early pace setter in the second session Simone Corsi did not improve but his early lap remained good enough for an eventual sixth for NGM Forward Racing.

Paginas Amarillas HP 40 team-mates Maverick Vinales and Luis Salom were seventh and eighth respectively.

Tasca Racing's Alex De Angelis posted the ninth fastest time with Jordi Torres showing late improvement to move his Aspar machine into the top ten.

Title hopeful Mika Kallio was eleventh with a time set on just his eighth lap on the Marc VDS bike as the Finn failed to make his mark as the session went on.

Britain's Sam Lowes was one of just two riders not to improve on their FP1 time. His pace from earlier in the day, which had put him third at the time for Speed Up, remained good enough to hold on for 13th.

Jonas Folger was the other rider not to make any progress in the afternoon session leaving the German AGR rider with much to do ahead of qualifying down in 27th.

Gino Rea put in the 31st best time for AGT REA Racing.

Mattia Pasini was the first rider to crash, falling in the final corner in the opening minutes. He was swiftly followed off track by Axel Pons who's AGR bike took heavy damage and the sliding Tech 3 of Ricky Cardus.

With fourteen minutes remaining Randy Krummenacher tussled with the rumble strips, leaving his Octo IodaRacing Team machine in the middle of the track.

The Swiss rider moved the bike himself but left a trail of grassy clumps behind, causing the session to be briefly red flagged while the track was cleared.