Manuel González was the fastest in the first practice of the Moto2 Indonesian Grand Prix, setting a new category lap record in Mandalika. The session was interrupted for several minutes with a red flag.
After the first flying laps, González (Correos Prepago Yamaha VR46 Master Camp/Kalex) was already in the lead. After Alberto Surra (Forward Team) and Pedro Acosta (Red Bull KTM Ajo/Kalex) also took the lead, the Spaniard returned to the front, only to be overtaken shortly after by Arón Canet (Pons Wegow Los40/Kalex).
A crash at turn 14 took Acosta out of contention early on. The rider emerged unharmed, but the bike suffered extensive damage.
On the track, lap times continued to drop, and after about a quarter of an hour, Fermín Aldeguer (Beta Tools SpeedUp/Boscoscuro) took the lead for the second time.
The Spaniard held the position for about 15 minutes, during which the session was interrupted with a red flag. Technical issues at the circuit were the reason for the stoppage.
After the restart, there were more changes in leadership: González, Aldeguer, and Canet took turns at the top before González set a new lap record in 1m34.871s on his final attempt. Canet finished second, 0.360s behind, while Jake Dixon (Inde GasGas Aspar/Kalex) finished third. Sam Lowes (Elf Marc VDS/Kalex) and Ai Ogura (Idemitsu Honda Team Asia/Kalex) rounded out the top five. Acosta finished 30th and last with his single flying lap.
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