2017 Moto3 World Championship

Team changes

• Paolo Simoncelli's team Sic58 Squadra Corse made their Moto3 debut, fielding two Honda NSF250RWs for Tony Arbolino and Tatsuki Suzuki.
• 3570 Team Italia left Moto3 for the Supersport 300 World Championship.
• After spending the previous season in Moto3, RW Racing GP switched to Moto2.
• AGR Team fielded one bike in Moto3, after spending the previous season in Moto2 with two bikes.
• After entering the 2016 season with three bikes, both Leopard Racing and Sky Racing Team VR46 reverted to two bikes in 2017.
• After spending the previous season with Mahindra, Platinum Bay Real Estate changed bikes to KTM.
• Ongetta-Rivacold changed their name to Snipers Team, with Marinelli Rivacold as their main sponsor.

  Rider changes

• After spending two seasons as a replacement rider, Lorenzo Dalla Porta has made his full season debut with Aspar Mahindra Moto3, filling in the seat vacated by Francesco Bagnaia who moved up to Moto2.
• Romano Fenati, who was fired from Valentino Rossi's team Sky Racing Team VR46 midway through last season due to behavioral issues, landed a ride with Snipers Team for the 2017 season.
• Niccolò Antonelli left Ongetta-Rivacold to join Red Bull KTM Ajo, replacing Brad Binder who moved up to Moto2.
• Enea Bastianini moved to Estrella Galicia 0,0, filling in the seat vacated by Jorge Navarro who moves up to Moto2, with Jorge Martín replacing Bastianini in Gresini Racing Moto3.
• John McPhee moved to a brand new UK-based team backed by Dorna, GB Team with Jakub Kornfeil replacing him at Peugeot MC Saxoprint.
• María Herrera has moved to AGR Team, who decided to field one bike in Moto3. Herrera previously rode for her own team in 2016 after taking over the assets of Team Laglisse.
• Tony Arbolino has made his Moto3 debut with the new Moto3 team Sic58 Squadra Corse, having rode for the team in 2016 FIM CEV Moto3 Junior World Championship.
• 2016 Red Bull MotoGP Rookies Cup Champion, Ayumu Sasaki made his Moto3 debut with SIC Racing Team, filling the seat vacated by Jakub Kornfeil.
• After spending the previous season as a replacement rider for Peugeot MC Saxoprint, Albert Arenas made his full season debut with Aspar Mahindra Moto3, filling the seat vacated by Jorge Martín.
• Tatsuki Suzuki moved to the new team Sic58 Squadra Corse, with both Marco Bezzecchi and Manuel Pagliani made their Moto3 full season debut, filling in the two seats vacated by Suzuki and Fabio Spiranelli at CIP-Unicom Starker.
• Patrik Pulkkinen made his Moto3 debut, joining Peugeot MC Saxoprint.
• Livio Loi moved to Leopard Racing, filling in the seat vacated by both Fabio Quartararo and Andrea Locatelli who moved up to Moto2.
• Both Kaito Toba and Nakarin Atiratphuvapat set to make their Moto3 debut with Honda Team Asia, being promoted from Asia Talent Team Academy after Hiroki Ono left the team and Khairul Idham Pawi got promoted to Moto2.
• Enzo Boulom, who was on the provisional entry list as Wildcard & Replacement Rider, withdrew from the championship.

  Mid-season changes

• Danny Kent returned to Moto3 after leaving Kiefer Racing in Moto2. After joining Red Bull KTM Ajo as a wildcard at the French GP, at Germany, Kent also replaced Niccolò Antonelli at the same team.
• Darryn Binder was replaced by Dennis Foggia at the Czech GP. Jaume Masiá replaced him for 3 rounds.
• AGR Team folded its operations in both Moto2 and Moto3 following the Aragon GP due to financial issues coupled with poor performance throughout the 2017 season. For the Australian and Malaysian rounds, María Herrera replaced Albert Arenas at the Aspar team. At the Valencia GP, Arenas returned.

  Results and standings

Grands Prix

Riders' standings

Constructors' standings Each constructor received the same number of points as their best placed rider in each race. Pos Constructor QAT