Quartararo Halts Yamaha Development: The Pirelli Test Was the Trigger

• Quartararo is not allowed to take part in the Monday test after the Austrian GP because Yamaha does not want to put him on Pirelli tyres
• In Aragon he tested the same chassis three times, finished the race 18th and last, and lost an engine in the sprint
• Other manufacturers let their departing factory riders sample the 2027 machinery at the Brno test in June

Something broke between Fabio Quartararo and Yamaha in Aragon that goes beyond a bad race weekend. The 2021 world champion is leaving the Japanese manufacturer after eight years and will ride for the Honda factory team from 2027. In the remaining eight races of the 2026 season, however, he no longer wants to take part in development work for the coming season. The reason lies less in his sporting slump than in a decision Yamaha made behind the scenes.

Why does Quartararo no longer want to help Yamaha with development?

Quartararo justifies his stance with the fact that Yamaha has barred him from testing the new Pirelli tyres in Austria. He sees no point in continuing to evaluate components for a motorcycle other riders will benefit from, while he himself is denied the one test that would be relevant to his own future.

On Saturday in Aragon, only a single sentence dropped, but it immediately made the paddock sit up. He said he would not be in a position to help going forward, and that for personal reasons he had no desire to either. On Sunday he explained himself what lay behind that wording. Speaking to French media, he said: “To be clear: I don’t know whether I’m allowed to say this, but I’ll say it anyway. I wanted to do the test in Austria.” And further: “But unfortunately Yamaha doesn’t want me to ride the Pirelli tyres. I wanted to contribute something, but they don’t want it.”

From that he draws a clear conclusion. “Personally, I have no desire to develop the bike for the 2027 riders. So if we can still improve something for this year, I will do that. But I am not going to push to the limit and play the test rider the way I did this weekend.”

Asked whether that meant Yamaha did not want to help him find out something for his own future, he answered with a curt yes.

What is planned for the Pirelli test in Austria?

The test takes place on the Monday after the Grand Prix of Austria at the Red Bull Ring and is only the second opportunity for regular riders to sample the new Pirelli compounds for 2027. From next season Pirelli replaces Michelin as the sole supplier, and at the same time capacity drops to 850 cubic centimetres.

For the riders, every kilometre on the new rubber is valuable, because the tyres are said to differ significantly from today’s. That, however, is exactly why the manufacturers are holding back. Anyone who lets a departing rider onto the new machinery gives him not only tyre experience but possibly also knowledge about their own 850 project.

Yamaha is developing its 850 with test riders Augusto Fernández and Andrea Dovizioso. Quartararo getting to see that bike was never up for discussion. In the paddock, though, there is talk of at least allowing riders in his contract situation to run the Pirelli tyres on the current 1000cc machines. Yamaha has not taken up that option for him.

How do other manufacturers handle departing riders?

Considerably more generously. At the first official 2027 test in June at Brno, Honda let its current riders Luca Marini and Joan Mir run the complete package including Pirelli tyres, even though both will race for other brands next year. KTM handed the development work to Pedro Acosta, even though the Spaniard moves to the Ducati factory team in 2027.

According to media reports, KTM motorsport director Pit Beirer justified that openly with the quality of his rider: “For us, it’s quite simple: Pedro is the fastest and the best KTM rider we’ve ever had and currently have. So, we want to have the benchmark data from our best rider.”

At Yamaha, Toprak Razgatlioglu took over the 850 at Brno, at Ducati it was Marc Márquez and at Aprilia Marco Bezzecchi. All three are staying with their teams. A larger turnout is expected at Spielberg than in June.

The Aragon weekend: test work instead of race preparation

Yamaha had brought several new parts to Aragon for Quartararo to evaluate. Team principal Paolo Pavesio confirmed as early as Friday that the Frenchman was supposed to gather data on various solutions, above all on the chassis, meaning the load-bearing frame of the motorcycle.

The problem: Quartararo had made up his mind quickly. He describes riding the new chassis three times and arriving at the same conclusion every time. “Yesterday I said the chassis is worse. They wanted to compare it again this morning. It was worse.” A new linkage, a component that transfers the spring action at the rear wheel, brought no progress either. In the end he was back on the standard bike.

The many changes cost him track time and orientation. He describes the weekend as being more about testing than about hunting for lap time, and that after every chassis change he lacked feeling for the bike. On Sunday he drew his conclusion and announced that he no longer wants to try a hundred things in a single weekend.

Engine failure in the sprint and a tight allocation

In Saturday’s sprint, Quartararo rolled to a halt on lap five with the bike smoking. He was running 16th at that point. The engine failure did not come as a surprise to him: the engine had almost died at the start, and on the straight he had felt the power fading. “So I knew it would blow up at some point.” Because he immediately pulled off the track, no oil reached the racing line.

He could not say anything about the engine’s mileage straight after the sprint. He merely noted that the bike had been slow all weekend and expressed the hope that it had been a heavily used engine.

The failure has sporting consequences. In concession rank D, the tier for the weakest manufacturers, Yamaha may use ten engines per rider and season. Before Aragon, Quartararo had already used seven units, one of which had been struck from the allocation after an engine problem at the season opener in Buriram. Aragon adds a second failure. Should he need an eleventh engine in the remaining races, he would have to start from pit lane.

How did he end up last in the race?

Quartararo dropped to the back of the field on the opening lap and lost around 15 seconds on lap 15 of 23 after running through the gravel. After that the deficit could no longer be made up.

He describes several locking wheels over the course of the race. After a braking manoeuvre in the slipstream the rear slid away from him, in turn seven the front locked, and finally he ended up in the gravel. He completed the lap in question in 2:08.091 minutes, having ridden 1:48.120 minutes on the previous lap, at that point running 16th. He puts the mistakes down to himself and explains them with the attempt to go as fast as possible.

At the flag he was 18th, the last classified rider, around two seconds behind Aprilia stand-in Lorenzo Savadori, roughly 24 seconds behind Yamaha team-mate Jack Miller and about 51 seconds behind winner Marc Márquez. It was only the third time in his MotoGP career that he finished a full-distance race last. The first time was in Thailand in 2024, the second in early August at Silverstone.

Aragon was never a strong track for him anyway. His best result there remains a fifth place from his rookie season in 2019.

What the rift means for Yamaha’s 2027 season

The timing is awkward for Yamaha. Despite two last places, Quartararo is still the best-placed Yamaha rider in the world championship, and the manufacturer sits at the bottom of the constructors’ standings. His best result of the season is a fifth place in Barcelona.

The new V4 Yamaha has not delivered the hoped-for leap so far. Quartararo has repeatedly described expecting more after the first test in Barcelona, and that no notable progress came between September and November. The current package, he says, still closely resembles the first version of the bike. Normally, in his assessment, the first steps on a new project are big, and only after that does it get difficult. It is exactly that big step that has failed to materialise.

According to media reports, the decision against Yamaha was already taken at the Valencia test last year. Quartararo talks about having the feeling there that he needed something new, and that the course towards leaving was set at that point. Which team it would be was not yet settled back then.

At the same time he has publicly accepted that Yamaha is putting further development of the current 1000cc bike on hold in favour of the 2027 project. He considers that course understandable for the brand. He draws the line only where he himself is supposed to do work for a future he is no longer part of.

That leaves Yamaha facing a contradiction likely to shape the transitional 2026 season: the manufacturer has an experienced reference rider until the end of the year, yet can only make limited use of his feedback for the decisive 850 project. For the final eight races of a partnership that produced a world title in 2021, that is a difficult starting position.

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