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MotoGP: Yamaha working on seamless downshifts

“Our seamless shift [gearbox] is only upshift and not downshift.”
Factory Yamaha MotoGP riders Valentino Rossi and Jorge Lorenzo may be able to make clutch-less downshifts, but they are not yet seamless.

Yamaha joined Honda and Ducati in running a seamless shift gearbox during the second half of last season, slashing the time lost when changing up the gearbox.

Clutch-less downshifts - changing down without using the clutch lever - were then introduced for 2014. Note Rossi's left hand in the pictures below:

Rossi using clutch lever while braking at Sachsenring 2013 (above)
Rossi not using clutch lever while braking at Sachsenring 2014

However Honda remains a step ahead due to shorter and smoother 'seamless' downshifts. A crucial part of braking and corner entry.

“Our seamless shift is only upshift and not downshift,” confirmed Yamaha MotoGP Group Leader Kouichi Tsuji. “I think the Honda [gearbox] is both up and down, seamless. We are trying to catch up, but when I don't know. We are pushing hard to develop. Maybe this is part [of the gap to Honda] but not everything.”

On Thursday at Brno, Rossi stated that Honda seems to have 'found' something and increased the gap to Yamaha this year.

“Honestly speaking our machine is still behind Honda's RCV,” Tsuji admitted.

At that point HRC vice president Shuhei Nakamoto quipped: “But our riders complain also!”

World champion Marc Marquez has won every race this season with Repsol Honda team-mate Dani Pedrosa second in the championship.

Rossi had speculated that the 2014 Honda gain is from “something in the electronic and also in the chassis.”

Nakamoto rejected the suggestion that there has been some form of technical breakthrough.

“Some people are saying Honda are doing something special, but the reality is not,” he declared. “Marc doesn't want to use the Honda traction control system - so our traction control system is the rider's right hand!”

In other words, Marquez favours as little traction control as possible.


Tagged as: Honda , Yamaha

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Moto89

August 15, 2014 5:01 PM
Last Edited 40 days ago

@Guna4699: Point is Rossi claimed Stoner's speed was because of his trust in the electronics. Then we found out Stoner used less traction control than Rossi himself would end up using once he got on to the Ducati. In other words Rossi was proved wrong about his assumptions. Hence why at the end of his Ducati tenure, Rossi had to admit that he couldn't understand how Stoner made the difference on the Ducati, because all the assumptions Rossi had about Stoner were wrong in the first place.

Vilas46

August 15, 2014 6:59 PM

Moto89 You rigth about Marquez is special and he prove that in every class he was not only Motogp, but its also clear that Honda has Tecnology Advantages againt Yamaha that until now is the only one that dont have the Full seamless gearbox, Even Ducati has this Gearbox or somethingh similar to Honda.. Now speacking about Casey is times on Ducati is what i call the Bullsht of Dorna, he only Won with Ducati in 2007 thankx to the Advantages that Ducati found against the others in 800cc and they could only smille for one Year because the Next 3 where Won by Yamaha and 2 of them was with Rossi only to Shat up this conversacion.. Rossi was clearly rigth about Ducati recente advantages in electronics and also the impact that the new Bridgstone tyres had... What happen to Ducati and Casey on the next years is the result of evem more improvements from the Factory japonese bikes and the Wrong direction taken by Ducati with the Carbon Chassi that Bring a lot of problems to control one bike that



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