The 2017 Moto2 season was a part of the 69th F.I.M. Road Racing World Championship season. Johann Zarco was the reigning series champion but he wasn't defending his title as he joined the series' premier class, MotoGP. The season was marred by the death of Stefan Kiefer in Malaysia. The 2017 season was the first season for the KTM Moto2 chassis, after KTM expanded its factory operations to Moto2 and MotoGP.
Calendar
The following Grands Prix were scheduled to take place in 2017.
The British Grand Prix was scheduled to move from Silverstone to the new Circuit of Wales, but construction on the new track has not commenced. The two circuits reached a deal that will see Silverstone continue to host the British Grand Prix in 2017, with an option to host the 2018 race.
Teams and riders
A provisional list of team entrants for 2017 was released on 26 October 2016. All Moto2 competitors raced with an identical CBR600RR inline-four engine developed by Honda. Teams competed with tyres supplied by Dunlop.
Miguel Oliveira switched team to Red Bull KTM Ajo, with 2016 Moto3 championBrad Binder who has been promoted to Ajo's Moto2 team as Oliveira's teammate. Both will fill the spot vacated by Johann Zarco who moved up to MotoGP with Monster Yamaha Tech 3 after winning two consecutive Moto2 titles.
Xavier Siméon switched from QMMF Racing Team to Tasca Racing Scuderia Moto2 for 2017 as a replacement for Remy Gardner.
Tetsuta Nagashima returned to Moto2 full-time with SAG Team, replacing Jesko Raffin who switched teams to CarXpert Interwetten.
CarXpert Interwetten promotes Iker Lecuona with a full-season seat in the team after Lecuona becoming the replacement rider for Dominique Aegerter in 2016.
Ajo Motorsport switched to KTM bikes, with KTM making their Moto2 debut. KTM will field two bikes for Brad Binder and Miguel Oliveira.
Valentino Rossi's Sky Racing Team VR46 expanded to Moto2, fielding two Kalex bikes for Francesco Bagnaia and Stefano Manzi.
SAG Team will field two bikes again, after running most of the 2016 season with only one bike due to Luis Salom's death at the Catalonia Grand Prix.
After four years with Kalex, Dynavolt Intact GP switched to Suter.
Leopard Racing will revert to their original name Kiefer Racing. In addition, they have also switched to Suter.
Italtrans Racing Team are competing with two bikes again in 2017, with Pasini and Locatelli riding.
AGR Team have downsized to one bike in exchange for one slot in Moto3 for 2017.
QMMF Racing Team withdrew from the championship. As a result of losing their customer, Speed Up have expanded to two bikes.
RW Racing GP switched from Moto3 to Moto2 for 2017.
Mid-season changes
Danny Kent surprisingly left Kiefer Racing after not starting the Grand Prix of the Americas due to 'irreconcilable differences'. Federico Fuligni temporarily replaced him in Jerez before Kiefer Racing announced that Tarran Mackenzie will replace Kent for the remainder of the season. Kent returned to Moto2 with GaragePlus Interwetten replacing injured Iker Lecuona at the Italian Grand Prix. At the Austrian Grand Prix, Kent rejoined Moto2 to replace Marcel Schrötter at Dynavolt Intact GP.
Ricard Cardús replaces Brad Binder at Red Bull KTM Ajo for 3 rounds. He also replaced Thomas Lüthi at CarXpert Interwetten in Valencia GP.
Axel Bassani left Speed Up after the French Grand Prix due to his bad results with the team, so he was replaced by Augusto Fernández for the rest of the season.
Yonny Hernández left the AGR Team midway through the season due to inconsistent race results, managing only 16 points over 9 races. He will be replaced by the AmericanJoe Roberts for the remainder of the season. After the Aragon Grand Prix, AGR Team folded for the rest of the season.
Results and standings
Grands Prix
Riders' standings
;Scoring system Points are awarded to the top fifteen finishers. A rider has to finish the race to earn points.
Grand Prix of Qatar
Gran Premio Red Bull de España
HJC Helmets 
Gran Premi 
Motul TT 
GoPro Motorrad Grand Prix Deutschland
Monster Energy Grand Prix České republiky
NeroGiardini Motorrad Grand Prix von Österreich
Octo 
Gran Premio Movistar de Aragón
Motul Grand Prix of Japan
Michelin 
Shell Malaysia 
Gran Premio Motul