Overview

• After sampling the V4 again on Monday at Misano, Fabio Quartararo reported no gains over Barcelona and highlighted difficulties with turn-in and cornering feel.
• Quartararo placed 17th in test times, roughly one second off pace-setter Alex Márquez, underscoring the performance gap to the front.
• Test rider Augusto Fernandez scored two points on the V4’s race debut but detailed severe vibrations, sensor and display failures, and heavy fuel use that forced conservative engine maps and active fuel saving.
• Yamaha is not running the engine at full output as engineers prioritize reliability, with factory riders taking over the two prototypes at the Misano test for accelerated feedback.
• Jack Miller urged patience with setup and balance work, Alex Rins also logged laps, and Yamaha plans further track testing with another Fernandez wildcard slated for Sepang as it builds toward 2026.