V♐alentino Rossi built on his competitive Yamaha return by clipping a further half-second from his best time on day two of MotoGP testing at Sepang.

That kept the Italian fourth overall, with 🍎Dani Pedrosa (Honda), Jorge Lorenzo (Yamaha) and Marc Marquez (Honda) once again in front.

Rossi remained just under 0.5s from Pedrosa, but felt he lost the ℱchance to at least match star rookie Marquez (+0.254s) after a mistake at the hairpin.

On the positive side, Rossi stated that his average time had improved by more than the half-second seen on the best൲ lap ranking.

Rossi's fastest Wednesday𒁏 lap was a 2m 1.038s, just shy of his 2m 0s target. Rossi's quickest Sepang lap in testing for Duc🐠ati was a 2m 0.824s, last year, while he recorded a 2m 0.271s on the 800cc Yamaha in 2010.

"I am happy because I improved today. This is a great feeling!"💜 smiled Rossi, who often struggled to make successive ga🦹ins during two tough seasons at Ducati.

"I improved half a seco🦹nd with the new tyre and now the lap time starts to be quite interesting.

"More i🔯mportantly I improved my rhythm by more than half a second. Today I was able to run constantly in the low 2m 1s. This🌌 is so important.

"There remains a small regret because I wanted to do a 2m 0s but unfortunately before the rain I did a mistake in the hairpin. If not, I could stay more or less with the lap time of🐻 Marquez.

"But anywaജy, without the rain [at 4pm], I would expect Pedrosa, Lorenzo and Marquez to also improve.

"They are very strong," he said of the three riders ahead of him. "I can see Lorenzo from close and he is able to do the lap time🎃 from the first mo🐎ment.

"Lorenzo has a great feeling wi🦋th the bike - like Pedrosa and also Marquez, Marquez maybe a little bit less.

"But Marquez is scary because he has t🐼he most potential to improve.

"Usually in the second half🐭🔥 of last year Lorenzo and Pedrosa were in front. So to be fourth and not so far from them is positive.

"Tomorrow will be important becaus🎃e we will have some more soft tyres to try, so if the conditions are good it could be funny!"

In terms of technical improvements,ꦓ Rossi highlighted acceleration as the area where the most gains can be made.

"It looks like Honda is ab𒁏le to put more horsepowe🔴r on the ground. Not because they have more horsepower, but because they can use more of it - they have more mechanical grip," he explained.

Rossi confirmed that he wants a seamless shif🅷t gearbox and is "pushing" Yamaha to get it, but "we don't know if it wilℱl arrive or not".

Rossi used a seamless shift gearbox at Ducati, but said th♒e Ducati 'box "is not the same as the Honda. It is between the Yamaha and the Honda."

Meawhile, it is not just Rossi who is happy to be🍎 back at Yamaha - where he won four of his seven MotoGP titles - his crew chief Jeremy Burgess and group of mechanics are also enjoying the 'atmosphere'...

"Jeremy is very happy," said Rossi. "Also the guys in the garage have great motivation - they can finish at 6pm, they can drink beer, they have time! This is very important for 🌌the atmosphere.

"L💯ast ♒year at 6pm the bike was all open in the garage - they were not very happy!"

The ꦗfirst Sepang test conc♎ludes on Thursday evening.