The 2021 world champion mentioned “one thing went unsuitable” after the sooner engine which he had beforehand examined in Misano produced the identical velocity as his 2022 engine.
He mentioned the group’s take a look at rider Cal Crutchlow had examined the motor at each Motegi and Jerez, the place it produced extra horsepower, but it surely failed to take action at Circuit Ricardo Tormo.
Quartararo had beforehand praised the 2023 engine, and mentioned it was a “large enchancment” after the Misano take a look at in September.
However this comes off the again of Yamaha being pressured to ditch the engine it had deliberate to make use of in 2022 within the winter owing to reliability points, leaving him with a unit nearer in efficiency to the 2021 spec for this season.
Talking after Tuesday’s take a look at in Valencia, Quartararo mentioned: “I’m stunned, as a result of truly this engine was presupposed to be just a little bit sooner than the one we examined in Misano and Barcelona and I discovered that it was the identical as two days in the past, particularly on the qualifying lap.
“We in contrast the velocity and it was the identical, so we have now to analyse what occurred as a result of additionally we have now two assessments, Misano, Barcelona then Cal make Motegi and Jerez and so they see the distinction on the engine.
“However proper now, was no distinction, so we have now to analyse very well what occurred.”
He added: “The factor is, usually this engine has extra horsepower and in Jerez Cal tried it and it was clearly higher.
“However proper now, we test like I mentioned earlier than, high velocity with final 12 months is similar.
“So there can be an issue for certain, not within the engine however one thing occurred that we didn’t have this further energy that we had been anticipating.”
Fabio Quartararo, Yamaha Manufacturing unit Racing
Photograph by: Gold and Goose / Motorsport Images
Quartararo clocked 327.4kph on Tuesday, 8kph slower than newly topped world champion Francesco Bagnaia, whose manufacturing facility Ducati hit 335.4kph.
Crew-mate Franco Morbidelli additionally struggled, with a high velocity of 325.8kph.
Requested by Autosport whether or not he was disenchanted, he added: “After all, it’s not the best way I wished to finish the 12 months. However on the finish, one thing went unsuitable.
“It’s not potential that in Misano and Barcelona, we really feel an enchancment after which proper now in the present day, there’s nothing.
‘I imply, one thing went unsuitable, however I suppose for Franco was the identical as a result of I see he’s additionally fairly on the underside within the velocity.
“I had just one slipstream in order that’s why I went 327 I believe. Whenever you test the highest guys in entrance, it’s fairly excessive, so we have now to analyse.”
Yamaha additionally examined a brand new aero bundle, of which Quartararo mentioned he may “really feel the distinction,” and examined a rear wing which he mentioned “might be one thing fascinating.”
The Frenchman mentioned: “You are feeling the distinction, however you may’t actually say if it’s higher or not, as a result of in aero bundle principally with the larger wing you could have much less wheelie, however you don’t know in the event you lose extra in high velocity or in acceleration, on braking.
“So that is extra work the place it’s good to test within the knowledge, as a result of in my feeling is you may see that okay, we have now much less wheelie, we have now extra wheelie, however then in lap time or the information you may see higher.”