Vinales' begin has gotten the attention of best on the planet Marc Marquez, who trusts the Spaniard looks more grounded than his partner Valentino Rossi, and the 22-year-old feels there is more speed to come.
"I can in any case get considerably more from the Yamaha by refining my riding style," said Vinales. "Phillip Island will be a decent test since I adore the track and I have dependably had a decent time there.
"I'll attempt to go quicker than I did on the Suzuki a year ago. In the meantime it is a circuit that progressions a ton relying upon temperatures.
"With 10 degrees C pretty much it might turn into a totally unique track, and it can go from "convoluted" to 'brilliant'.
"Regardless we need to discover what climate we will have, yet I think the Yamaha is a decent bicycle for Phillip Island. We will attempt to have a ton of fun and proceed with our work in light of the race."
Vinales' initial test shape has inspired Yamaha group supervisor Lin Jarvis, who accepts both his riders will be in a position to challenge for the riders' title this year.
"Each time he's been out, he's been quickest," Jarvis said of Vinales. "He's fitted in, exceptionally well to the group, to the bicycle, he feels good and centered.
"Free thinker, as I would see it, is a genuine title contender this year. We have two folks totally skilled."
On Rossi's title trusts, he stated: "In the most recent three years, Valentino has been second, second and second. So that is entirely amazing.
"He will turn 38 [on] February 16, so to at present have that speed at that age is marvelous – and unmistakably he can possibly win that tenth title."
Extra announcing by Francesco Corghi