Pedro Acosta topped the delayed, weather-affected MotoGP Free Practice One at Goiânia, posting the fastest lap of 1:26.688 aboard his Michelin-shod Red Bull KTM. Jack Miller was 0.087s back on the Prima Pramac Yamaha with a 1:26.775 and Marco Bezzecchi was third in 1:26.918; Marc Márquez (1:26.975), Franco Morbidelli (1:27.170) and Maverick Viñales completed the top six. The session started late after heavy rain and was extended, beginning on wets as the circuit dried; Márquez led much of the early running on wets while Miller became the first rider to switch to slicks about 30 minutes from the end. Accounts vary on whether Acosta’s quickest lap came on wets or during the late scramble on slicks, but his 1:26.688 remained top of the timesheet. Organizers and Michelin provided an enlarged tire allocation for the unpredictable conditions, and teams were mindful that the shortened, rescheduled afternoon practice (moved to 16:00 local and reduced to one hour) would decide the top ten who go straight into Saturday’s Q2.

Moto2’s opening Free Practice One ran in wet morning conditions that kept lap times elevated: Alex Escrig led the class with a 1:30.102 on his Pirelli-shod KLINT Racing Team Forward machine, Izan Guevara was second with a 1:30.171 and Mario Aji third on 1:30.207. The 28-rider field used the damp running to start setup work and tire decisions; later Friday running in the afternoon produced much quicker times (Tony Arbolino topped that session with a 1:23.709), underlining how the drying track changed pace and set-up priorities.

In Moto3 Free Practice One Brian Uriarte topped the 25-rider class with a 1:32.812 on his Red Bull KTM Ajo bike, Maximo Quiles was second on 1:33.206 and Joel Esteban third on 1:33.606. The session was run on the mandated Pirelli control tires and the tight time gaps among the leaders signaled close competition; across all three classes teams said tire choice and the evolving grip as the circuit dried were the decisive factors shaping practice placings and strategy for qualifying and the race weekend.

“The new M1 doesn’t have a single strong point,” Fabio Quartararo said on the eve of the Brazilian Grand Prix, summing up Yamaha’s early-season struggles after switching to a V4 layout. Riders have repeatedly reported a lack of engine power and poor front-end feel, and Quartararo said the change has hurt one-lap performance compared with last year, when he still took four poles. Yamaha accepted an early-season performance drop after the layout change, and both Toprak Razgatlıoğlu—who attended the Jerez test on Michelin rubber—and Jack Miller have framed the package as a development project rather than a race-ready solution.

Yamaha’s between-races private test at Jerez and early Pirelli tyre work, partly focused on 2027 tyre development, produced no meaningful progress, riders say. On-track evidence underlined the problem: after the Thailand season-opener at Buriram Yamaha remained well adrift of rivals, with Quartararo the top Yamaha finisher in P14, and he and Alex Rins only scoring points largely because several front-runners retired. With Goiânia’s long corners and heavy braking points, riders warned that setup work would be especially important; Toprak said, “the M1 isn’t ready to compete, but I know things will be different in 2027,” and described ongoing adaptation via setup and gearbox changes.

For now the team plans to start weekends from the same baseline setup and use practice to make incremental adjustments rather than expecting a single track to deliver a quick fix. Yamaha hopes form will improve later in the season, possibly after the summer break, but anticipates more “suffering” in the short term. Off the track, Quartararo said he still enjoyed being in Brazil despite the technical frustrations.