Evaluating a new ꦫengine was the priority for Valentino Rossi during Wednesday's final day at the Valencia MotoG🎃P test.

As such, the Movistar Y𒀰amaha rider stuck to the 2016 Yamaha chassis he had switched to on Saturd♍ay night of the race weekend.

"Today we have to decide and test well some different engine, so we concentrate on that," said Ross♔i, who was seventh fastest, 0.691s from Honda's Marc Marquez.

"Because it’s an important test - and you can't make mist🏅akes - it’s better to have the same bikes to understand the engine. It was a long day, but was positive."

The new engine was aimed at providing, "more power w🐬ithout losing the smooth character f𒉰rom the bottom [of the rpm]. 

🦋"Valencia is not fantastic for testing the engine because it is quite small. But you can understan🧔d and we will continue to try it also in Sepang in ten days time."

The fact Rossi chose to evaluate the new engine with the 2016 chassis underlined that, like team-mate Maverick Vinales, the Italian favours thaඣt frame at the Spanish circuit.

But Rossi ruled out the new engine solving the rear-tyre degradation is🥀sues, which he feels is the main downside of the 2016 chassis.

"No. ಌThe 🌱engine doesn't help. We need something else."

Yamah𝓡a's private Sepang test will now be used to m꧟ake a final decision on the direction of the 2018 machine; engine and chassis.

"We will have the same chassis [options] at Sepang as 🤡here," Rossi said. "It was already the plan, sincerely. Because the last chassis that we used [the 2018 prototype, which debuted at Silverstone] was prepared for the end of this season, but we decided to use it before."

Rossi hopes that the final 2018 Yamaha will then ღbe ready in time for the next official test, to be held at the same Malay🃏sian circuit in late January.

"I hope it will be ready, becaus🍬e for me Yamaha have to do 🌸a long job with the balance of the bike."

In other words, the chassis.