Imagine pouring everything you have into a project, only to find it's still missing key ingredients. That's the challenge facing Yamaha and Fabio Quartararo as they grapple with the development of their new V4 engine for MotoGP. After the Valencia test, Quartararo has pinpointed exactly what's holding them back, and it's a race against time to fix it.
The 2021 world champion recently had his second opportunity to put Yamaha's 2026 prototype, powered by the new V4 engine, through its paces at the official MotoGP test in Valencia. The first test at Misano left Quartararo feeling that the new bike was actually worse than the previous inline-four version. That's a tough pill to swallow when you're aiming for a leap forward.
During the Valencia test, Quartararo completed 46 laps of the Circuit Ricardo Tormo. He managed to secure 15th position, making him the fastest Yamaha rider, but he was still 0.554 seconds behind Raul Fernandez, who was riding the 2025 Aprilia RS-GP. This highlights the gap Yamaha needs to close to be truly competitive.
Quartararo's feedback is crucial. He says the V4-spec M1 is currently lacking the front-end stability that was a strength of its predecessor – the inline-four bike. Think of it like trying to carve through a corner on a knife edge; the old bike gave him confidence, while the new one feels less planted. And this is the part most people miss: a stable front end is essential for a rider to push the limits, especially when entering corners at breakneck speeds. A lack of outright power also remains a significant hurdle. Yamaha is currently running the engine in a 'safe mode,' which limits its full potential.
Quartararo is hoping that a private test session at Valencia will help Yamaha address some of the critical issues plaguing their V4 program. "We worked a lot on the bike's set-up, trying to find the basis, because we don't have it yet," he explained. "In a nutshell, we had a very good front end [with the inline-four bike]. Today, we don't have that. That's why I say we need to find the basic set-up. Then we know that power is a fairly clear issue." He added that while they hoped for better grip, his priority was to provide the engineers with clear direction for finding solutions during the additional testing day.
Adding to the complexity, Yamaha's test rider, Augusto Fernandez, had previously debuted a new frame at the Valencia Grand Prix weekend. But here's where it gets controversial... Quartararo stated that he hadn't seen any significant upgrades on his side of the garage since the Misano test. "We were riding practically the same bike [as in Misano]. I'm not going to say it's a step forward," he admitted. "Tomorrow will be important. We have new things to try, like aerodynamics. So it will be important to see how that turns out." This raises the question: are the improvements being developed effectively translating to Quartararo's bike?
It's worth remembering that Quartararo was overwhelmingly negative about Yamaha's V4 challenger after the Misano test, even as other riders offered more optimistic opinions. When it was pointed out that he sounded more positive in Valencia, Quartararo clarified, "I'm more neutral. There's no point in saying too much." He emphasized the importance of giving the engineers clear direction on where to improve. He reiterated that the front end was a clear weakness, with the bike not turning enough, lacking power, and exhibiting different grip characteristics.
Yamaha made the firm decision to switch to the V4-spec M1, abandoning the inline-four engine, just before the Valencia GP. While Quartararo had his old 2025 challenger available, he only completed two laps on it before switching to the new version. Interestingly, his fastest time of the day was set on the V4 bike, suggesting some potential, even if currently untapped.
Yamaha may bring its outgoing MotoGP bike to the Sepang test in February for comparison purposes. However, Quartararo doesn't anticipate riders spending much time on it, as the focus remains firmly on developing the V4.
So, where does this leave Yamaha and Quartararo? They're facing an uphill battle to unlock the potential of the V4 engine. The key areas of focus are improving front-end stability, increasing power output, and refining the bike's overall setup. With limited testing opportunities, every lap counts.
Now, it's your turn. Do you think Yamaha made the right decision switching to the V4 engine, despite the current challenges? Can they close the gap to the competition in time for the 2026 season? Share your thoughts and predictions in the comments below!
