Fabio Quartararo has delivered his most damaging verdict yet on the Yamaha V4 project. Quartararo said the bike feels exactly the same as it did when he first rode it in September 2025 and that he sees no reaction from the factory, adding that for a new prototype in its first season of development this is deeply concerning. Yamaha have publicly acknowledged the V4 has significant electronics and chassis issues that have not yet been resolved. He is going to Honda. He cannot leave fast enough.
