The 2021 world champion mentioned “one thing went flawed” after the quicker engine which he had beforehand examined in Misano produced the identical velocity as his 2022 engine.
He mentioned the workforce’s check rider Cal Crutchlow had examined the motor at each Motegi and Jerez, the place it produced extra horsepower, however it 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 check in September.
However this comes off the again of Yamaha being compelled 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 check in Valencia, Quartararo mentioned: “I’m shocked, as a result of truly this engine was imagined to be somewhat bit quicker 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’ve to analyse what occurred as a result of additionally we’ve two checks, Misano, Barcelona then Cal make Motegi and Jerez they usually see the distinction on the engine.
“However proper now, was no distinction, so we’ve 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 verify like I mentioned earlier than, high velocity with final 12 months is similar.
“So there will probably be an issue for positive, not within the engine however one thing occurred that we didn’t have this further energy that we have been anticipating.”
Fabio Quartararo, Yamaha Manufacturing unit Racing
Picture by: Gold and Goose / Motorsport Images
Quartararo clocked 327.4kph on Tuesday, 8kph slower than newly topped world champion Francesco Bagnaia, whose manufacturing unit 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 disillusioned, he added: “In fact, it’s not the best way I wished to finish the 12 months. However on the finish, one thing went flawed.
“It’s not doable that in Misano and Barcelona, we really feel an enchancment after which proper now at the moment, there’s nothing.
‘I imply, one thing went flawed, 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 feel. While you verify the highest guys in entrance, it’s fairly excessive, so we’ve 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 attention-grabbing.”
The Frenchman mentioned: “You’re feeling the distinction, however you’ll be able to’t actually say if it’s higher or not, as a result of in aero bundle mainly with the larger wing you’ve gotten much less wheelie, however you don’t know should you lose extra in high velocity or in acceleration, on braking.
“So that is extra work the place it’s essential verify within the knowledge, as a result of in my feeling is you’ll be able to see that okay, we’ve much less wheelie, we’ve extra wheelie, however then in lap time or the information you’ll be able to see higher.”